DOC AIRBUS | AMM A320FInspection/Check of the Pitot Probe
TASK 34-11-15-200-001-A
Inspection/Check of the Pitot Probe
The purpose of this Task is to do a Visual inspection of the Pitot probe.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 34-11-15-865-053-A
Subtask 34-11-15-860-053-A
[Rev.10 from 2021]
2026.04.01 04:08:03 UTC
Inspection/Check of the Pitot Probe
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
IF THERE WAS AN AIRSPEED OR ALTITUDE DISCREPANCY REPORT ON THE PREVIOUS FLIGHT, DO A RESET OF THE TWO ELAC'S (OFF-ON OF THE ELAC 1 AND 2 PUSHBUTTON SWITCHES ON THE OVERHEAD PANEL) WITH THE THREE HYDRAULIC SYSTEMS DEPRESSURIZED.
1. Reason for the JobThe purpose of this Task is to do a Visual inspection of the Pitot probe.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | AIR SOURCE - REGULATED, FILTERED, DRY |
| No specific | 1 | BRUSH - BRISTLED, SOFT |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | SCOTCHBRITE |
| No specific | 1 | WATER SOURCE - GROUND |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BBD1) | Non Aqueous Cleaner-- Isopropyl Alcohol - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 125 | LATERAL AVIONIC COMPARTMENT |
| 126 | LATERAL AVIONIC COMPARTMENT |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 34-11-15-000-001-A | Removal of the Pitot Probe |
| TASK 34-11-15-400-001-A | Installation of the Pitot Probe |
| TASK 34-10-00-170-001-A | Flushing of the Total Pressure Lines (for corrective action) |
| TASK 34-10-00-170-003-A | Draining and Flushing of Standby Pneumatic Circuits (for corrective action) |
| TASK 34-11-15-000-001-A | Removal of the Pitot Probe (for corrective action) |
| TASK 34-11-15-400-001-A | Installation of the Pitot Probe (for corrective action) |
| TASK 34-22-25-170-001-A | Draining and Flushing of Standby Pneumatic Circuits (for corrective action) |
Pitot Probe Tip ConfigurationSubtask 34-11-15-865-053-A
A. Open, safety and tag this(these) circuit breaker(s):
Subtask 34-11-15-860-054-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| FOR FIN: 9DA1 (PROBEPITOT, 1) | |||
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| FOR FIN: 9DA2 (PROBEPITOT, 2) | |||
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| FOR FIN: 9DA3 (PROBEPITOT, 3) | |||
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |
B. Aircraft Maintenance Configuration
(1) Put the ACCESS PLATFORM 1M(3 FT) in position in Zone 125 to get access to the pitot probes 1 (9DA1) and 3 (9DA3) and in Zone 126 to get access to the pitot probe 2 (9DA2).
(2) Remove the cover of the pitot probe.
4. Procedure(1) Put the ACCESS PLATFORM 1M(3 FT) in position in Zone 125 to get access to the pitot probes 1 (9DA1) and 3 (9DA3) and in Zone 126 to get access to the pitot probe 2 (9DA2).
(2) Remove the cover of the pitot probe.
CAUTION:
IF THERE WAS AN AIRSPEED OR ALTITUDE DISCREPANCY REPORT ON THE PREVIOUS FLIGHT, DO A RESET OF THE TWO ELAC'S (OFF-ON OF THE ELAC 1 AND 2 PUSHBUTTON SWITCHES ON THE OVERHEAD PANEL) WITH THE THREE HYDRAULIC SYSTEMS DEPRESSURIZED.
Subtask 34-11-15-220-050-C ** ON A/C NOT FOR ALL A. Inspection/Check of the Pitot Probe (9DA1,9DA2,9DA3)
(1) Do a general visual inspection of the pitot probe for:
(a) Color:
1 After some time, the pitot probe tube becomes brown and/or black. This change in color has no effect on the operation of the pitot probe.
(b) Internal blockage:
a If the pitot probe is not clean, remove it (Ref. AMM TASK 34-11-15-000-001).
b Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY line has an oil trap to make sure that no oil goes into the pitot probe.
c Use the AIR SOURCE - REGULATED, FILTERED, DRY to blow air (maximum air pressure: 60 psi (4.14 bar)) into the pitot probe tube through the pneumatic connector. Make sure that the air comes out from the pitot-probe tube inlet.
d Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(c) Cleaning of the external surfaces:
2 Use the WATER SOURCE - GROUND and soak the pitot probe tube in clean water, or clean it with a Textile-Lint free Cotton - (Material No.14SBA1) soaked in tap water or the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) , or
3 Clean the pitot probe tube with the SCOTCHBRITE soaked in the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
4 Clean the electrical connector with the BRUSH - BRISTLED, SOFT or a Textile-Lint free Cotton - (Material No.14SBA1) .
5 Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(d) External condition:
1 Make sure that the pitot probe tube is not bent and that it has no holes or cracks. If you find damage, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
2 If there are signs of lightning strike (burn marks, spots, other damage/signs) on one of the pitot probes, replace it (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
3 If the protective cover is melted on the pitot probe, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(e) Make sure that the drain holes are not blocked. If they are blocked, flush the total pressure lines as follows:
(3) General pitot-probe condition:
(a) Plating:
1 Usual discoloration of the plating is permitted.
2 Scratches that do not go through the plating surfaces are permitted.
3 a The pitot probe is serviceable in the conditions that follow:
1 Make sure that the raised surfaces are not more than 0.076 mm (0.003 in.) in height or 7.62 mm (0.3 in.) in length and/or width.
2 Make sure that the dents and/or scratches are not more than 0.13 mm (0.005 in.) in depth or 7.62 mm (0.3 in.) in length and/or width.
(c) Baseplate surface (mounting-flange clearance area):
1 Make sure that the dents, scratches and/or raised surfaces are not more than 0.25 mm (0.01 in.) in depth and/or height.
(d) Baseplate edge surface:
1 Make sure that the raised surfaces are not more than 0.25 mm (0.01 in.) in height.
2 Make sure that there are no sharp edges.
(e) Strut (top surface):
1 Make sure that the dents and/or scratches are not more than 0.25 mm (0.01 in.) in depth and/or height on the strut body and the leading edge.
2 Make sure that the dents are not more than 0.635 mm (0.025 in.) in depth, in an area of 645.16 mm2 (1.0 in.2) along the trailing edge.
(4) Pitot-probe edge/lip condition:
(a) Make sure that the pitot probe opening is in its initial configuration, without deformation or dent, to get the maximum precision at very high Angle of Attack (AOA).
(b) If the results of the visual inspection of the pitot tube are unsatisfactory, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(c) 1 The leading edge lip of the pitot probe opening is sharp. The new pitot probes are sharper to have a maximum flat thickness of 0.254 mm (0.010 in.). If the pitot probe lip has erosion or a dent with a flat thickness of more than 0.635 mm (0.025 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(d) 1 Examine the pitot probe lip for small inner dents that can have an effect on the roundness of the pitot probe opening.
2 If the pitot probe indentation is more than 1.524 mm (0.060 in.) from the nominal lip diameter of 10.668 mm (0.420 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(e) 1 Examine the outer surface of the pitot-probe lip edge to make sure that it is smooth.
2 Examine for curled or flared-out pitot-probe lip-edge. Move your fingernail along the outer surface of the pitot probe lip to find the curled or flared-out edge.
3 If the pitot probe is curled or flared-out more than 1.270 mm (0.050 in.) and if the maximum measured lip diameter is more than 11.938 mm (0.470 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(f) 1 Examine the leading edge of the pitot probe lip for small nicks or chips:
a If two or more of the nicks are between 1.27 mm (0.050 in.) and 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
b If one nick is more than 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
Subtask 34-11-15-220-050-D (1) Do a general visual inspection of the pitot probe for:
(a) Color:
1 After some time, the pitot probe tube becomes brown and/or black. This change in color has no effect on the operation of the pitot probe.
(b) Internal blockage:
CAUTION:
DO NOT USE SHARP AND/OR METAL TOOLS OR OBJECTS TO CLEAN THE PITOT PROBE. SUCH TOOLS OR OBJECTS CAN CAUSE DAMAGE TO THE PITOT PROBE.
1 Make sure that the pitot probe is clean and that it has no blockage: a If the pitot probe is not clean, remove it (Ref. AMM TASK 34-11-15-000-001).
b Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY line has an oil trap to make sure that no oil goes into the pitot probe.
c Use the AIR SOURCE - REGULATED, FILTERED, DRY to blow air (maximum air pressure: 60 psi (4.14 bar)) into the pitot probe tube through the pneumatic connector. Make sure that the air comes out from the pitot-probe tube inlet.
d Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(c) Cleaning of the external surfaces:
CAUTION:
MAKE SURE THAT THE PITOT TUBE IS NOT EXPOSED TO CONTAMINATION, LUBRICATING OIL OR GREASE. IF YOU DO NOT OBEY THIS INSTRUCTION, CONTAMINATION OF THE TOTAL PRESSURE CIRCUITS OR DAMAGE TO THE PITOT TUBE CAN OCCUR.
CAUTION:
USE ONLY WATER AND ISOPROPYL ALCOHOL AS CLEANING AGENTS. DO NOT USE OTHER SOLVENTS OR CLEANERS BECAUSE THEY CAN BE NOT COMPATIBLE WITH THE PITOT TUBE MATERIAL. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PITOT TUBE CAN OCCUR.
CAUTION:
DO NOT SCOUR THE PITOT TUBE CONTOUR OR USE ABRASIVE MATERIAL ON IT. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PITOT TUBE CAN OCCUR.
1 Remove the pitot probe (Ref. AMM TASK 34-11-15-000-001).2 Use the WATER SOURCE - GROUND and soak the pitot probe tube in clean water, or clean it with a Textile-Lint free Cotton - (Material No.14SBA1) soaked in tap water or the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) , or
3 Clean the pitot probe tube with the SCOTCHBRITE soaked in the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
4 Clean the electrical connector with the BRUSH - BRISTLED, SOFT or a Textile-Lint free Cotton - (Material No.14SBA1) .
5 Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(d) External condition:
1 Make sure that the pitot probe tube is not bent and that it has no holes or cracks. If you find damage, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
2 If there are signs of lightning strike (burn marks, spots, other damage/signs) on one of the pitot probes, replace it (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
3 If the protective cover is melted on the pitot probe, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(e) Make sure that the drain holes are not blocked. If they are blocked, flush the total pressure lines as follows:
- For pitot probe(s) 1 and/or 2 (Ref. AMM TASK 34-10-00-170-001).
- For pitot probe 3 (Ref. AMM TASK 34-10-00-170-003) (only the standby total-pressure-line part).
(3) General pitot-probe condition:
(a) Plating:
1 Usual discoloration of the plating is permitted.
2 Scratches that do not go through the plating surfaces are permitted.
3 a The pitot probe is serviceable in the conditions that follow:
- If there is usual discoloration of the plating
- If the missing plating on the strut is less than 25.40 mm (1.0 in.) from the leading edge
- If the plating on the baseplate is missing.
- If it is not possible to read the model number on the strut label
- If the missing plating on the strut is more than 25.40 mm (1.0 in.) from the leading edge.
1 Make sure that the raised surfaces are not more than 0.076 mm (0.003 in.) in height or 7.62 mm (0.3 in.) in length and/or width.
2 Make sure that the dents and/or scratches are not more than 0.13 mm (0.005 in.) in depth or 7.62 mm (0.3 in.) in length and/or width.
(c) Baseplate surface (mounting-flange clearance area):
1 Make sure that the dents, scratches and/or raised surfaces are not more than 0.25 mm (0.01 in.) in depth and/or height.
(d) Baseplate edge surface:
1 Make sure that the raised surfaces are not more than 0.25 mm (0.01 in.) in height.
2 Make sure that there are no sharp edges.
(e) Strut (top surface):
1 Make sure that the dents and/or scratches are not more than 0.25 mm (0.01 in.) in depth and/or height on the strut body and the leading edge.
2 Make sure that the dents are not more than 0.635 mm (0.025 in.) in depth, in an area of 645.16 mm2 (1.0 in.2) along the trailing edge.
(4) Pitot-probe edge/lip condition:
(a) Make sure that the pitot probe opening is in its initial configuration, without deformation or dent, to get the maximum precision at very high Angle of Attack (AOA).
(b) If the results of the visual inspection of the pitot tube are unsatisfactory, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(c) 1 The leading edge lip of the pitot probe opening is sharp. The new pitot probes are sharper to have a maximum flat thickness of 0.254 mm (0.010 in.). If the pitot probe lip has erosion or a dent with a flat thickness of more than 0.635 mm (0.025 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(d) 1 Examine the pitot probe lip for small inner dents that can have an effect on the roundness of the pitot probe opening.
2 If the pitot probe indentation is more than 1.524 mm (0.060 in.) from the nominal lip diameter of 10.668 mm (0.420 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(e) 1 Examine the outer surface of the pitot-probe lip edge to make sure that it is smooth.
2 Examine for curled or flared-out pitot-probe lip-edge. Move your fingernail along the outer surface of the pitot probe lip to find the curled or flared-out edge.
3 If the pitot probe is curled or flared-out more than 1.270 mm (0.050 in.) and if the maximum measured lip diameter is more than 11.938 mm (0.470 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(f) 1 Examine the leading edge of the pitot probe lip for small nicks or chips:
a If two or more of the nicks are between 1.27 mm (0.050 in.) and 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
b If one nick is more than 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
DELETED
Subtask 34-11-15-220-050-E ** ON A/C NOT FOR ALL A. Inspection/Check of the Pitot Probe (9DA1,9DA2,9DA3)
(1) Do a general visual inspection of the pitot probe for:
(a) Color:
1 After some time, the pitot probe tube becomes brown and/or black. This change in color has no effect on the operation of the pitot probe.
(b) Internal blockage:
a If the pitot probe is not clean, remove it (Ref. AMM TASK 34-11-15-000-001).
b Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY line has an oil trap to make sure that no oil goes into the pitot probe.
c Use the AIR SOURCE - REGULATED, FILTERED, DRY to blow air (maximum air pressure: 60 psi (4.14 bar)) into the pitot probe tube through the pneumatic connector. Make sure that the air comes out from the pitot-probe tube inlet.
d Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(c) Cleaning of the external surfaces:
2 Use the WATER SOURCE - GROUND and soak the pitot probe tube in clean water, or clean it with a Textile-Lint free Cotton - (Material No.14SBA1) soaked in tap water or the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) , or
3 Clean the pitot probe tube with the SCOTCHBRITE soaked in the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
4 Clean the electrical connector with the BRUSH - BRISTLED, SOFT or a Textile-Lint free Cotton - (Material No.14SBA1) .
5 Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(d) External condition:
1 Make sure that the pitot probe tube is not bent and that it has no holes or cracks. If you find damage, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
2 If there are signs of lightning strike (burn marks, spots, other damage/signs) on one of the pitot probes, replace it (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
3 If the protective cover is melted on the pitot probe, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(e) Make sure that the drain holes are not blocked. If they are blocked, flush the total pressure lines as follows:
(3) General pitot-probe condition:
(a) Plating:
1 Usual discoloration of the plating is permitted.
2 Scratches that do not go through the plating surfaces are permitted.
3 a The pitot probe is serviceable in the conditions that follow:
1 Make sure that the raised surfaces are not more than 0.076 mm (0.003 in.) in height or 7.62 mm (0.3 in.) in length and/or width.
2 Make sure that the dents and/or scratches are not more than 0.13 mm (0.005 in.) in depth or 7.62 mm (0.3 in.) in length and/or width.
(c) Baseplate surface (mounting-flange clearance area):
1 Make sure that the dents, scratches and/or raised surfaces are not more than 0.25 mm (0.01 in.) in depth and/or height.
(d) Baseplate edge surface:
1 Make sure that the raised surfaces are not more than 0.25 mm (0.01 in.) in height.
2 Make sure that there are no sharp edges.
(e) Strut (top surface):
1 Make sure that the dents and/or scratches are not more than 0.25 mm (0.01 in.) in depth and/or height on the strut body and the leading edge.
2 Make sure that the dents are not more than 0.635 mm (0.025 in.) in depth, in an area of 645.16 mm2 (1.0 in.2) along the trailing edge.
(4) Pitot-probe edge/lip condition:
(a) Make sure that the pitot probe opening is in its initial configuration, without deformation or dent, to get the maximum precision at very high Angle of Attack (AOA).
(b) If the results of the visual inspection of the pitot tube are unsatisfactory, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(c) 1 The leading edge lip of the pitot probe opening is sharp. The new pitot probes are sharper to have a maximum flat thickness of 0.254 mm (0.010 in.). If the pitot probe lip has erosion or a dent with a flat thickness of more than 0.635 mm (0.025 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(d) 1 Examine the pitot probe lip for small inner dents that can have an effect on the roundness of the pitot probe opening.
2 If the pitot probe indentation is more than 1.524 mm (0.060 in.) from the nominal lip diameter of 10.668 mm (0.420 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(e) 1 Examine the outer surface of the pitot-probe lip edge to make sure that it is smooth.
2 Examine for curled or flared-out pitot-probe lip-edge. Move your fingernail along the outer surface of the pitot probe lip to find the curled or flared-out edge.
3 If the pitot probe is curled or flared-out more than 1.270 mm (0.050 in.) and if the maximum measured lip diameter is more than 11.938 mm (0.470 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(f) 1 Examine the leading edge of the pitot probe lip for small nicks or chips.
a If two or more of the nicks are between 1.270 mm (0.050 in.) and 0.060 in. (1.524 mm) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
b If one nick is more than 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
Subtask 34-11-15-220-050-J ** ON A/C NOT FOR ALL (1) Do a general visual inspection of the pitot probe for:
(a) Color:
1 After some time, the pitot probe tube becomes brown and/or black. This change in color has no effect on the operation of the pitot probe.
(b) Internal blockage:
CAUTION:
DO NOT USE SHARP AND/OR METAL TOOLS OR OBJECTS TO CLEAN THE PITOT PROBE. SUCH TOOLS OR OBJECTS CAN CAUSE DAMAGE TO THE PITOT PROBE.
1 Make sure that the pitot probe is clean and that it has no blockage:a If the pitot probe is not clean, remove it (Ref. AMM TASK 34-11-15-000-001).
b Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY line has an oil trap to make sure that no oil goes into the pitot probe.
c Use the AIR SOURCE - REGULATED, FILTERED, DRY to blow air (maximum air pressure: 60 psi (4.14 bar)) into the pitot probe tube through the pneumatic connector. Make sure that the air comes out from the pitot-probe tube inlet.
d Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(c) Cleaning of the external surfaces:
CAUTION:
MAKE SURE THAT THE PITOT TUBE IS NOT EXPOSED TO CONTAMINATION, LUBRICATING OIL OR GREASE. IF YOU DO NOT OBEY THIS INSTRUCTION, CONTAMINATION OF THE TOTAL PRESSURE CIRCUITS OR DAMAGE TO THE PITOT TUBE CAN OCCUR.
CAUTION:
USE ONLY WATER AND ISOPROPYL ALCOHOL AS CLEANING AGENTS. DO NOT USE OTHER SOLVENTS OR CLEANERS BECAUSE THEY CAN BE NOT COMPATIBLE WITH THE PITOT TUBE MATERIAL. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PITOT TUBE CAN OCCUR.
CAUTION:
DO NOT SCOUR THE PITOT TUBE CONTOUR OR USE ABRASIVE MATERIAL ON IT. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PITOT TUBE CAN OCCUR.
1 Remove the pitot probe (Ref. AMM TASK 34-11-15-000-001).2 Use the WATER SOURCE - GROUND and soak the pitot probe tube in clean water, or clean it with a Textile-Lint free Cotton - (Material No.14SBA1) soaked in tap water or the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) , or
3 Clean the pitot probe tube with the SCOTCHBRITE soaked in the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
4 Clean the electrical connector with the BRUSH - BRISTLED, SOFT or a Textile-Lint free Cotton - (Material No.14SBA1) .
5 Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(d) External condition:
1 Make sure that the pitot probe tube is not bent and that it has no holes or cracks. If you find damage, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
2 If there are signs of lightning strike (burn marks, spots, other damage/signs) on one of the pitot probes, replace it (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
3 If the protective cover is melted on the pitot probe, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(e) Make sure that the drain holes are not blocked. If they are blocked, flush the total pressure lines as follows:
- For pitot probe(s) 1 and/or 2 (Ref. AMM TASK 34-10-00-170-001).
- For pitot probe 3 (Ref. AMM TASK 34-22-25-170-001) (only the standby total-pressure-line part).
(3) General pitot-probe condition:
(a) Plating:
1 Usual discoloration of the plating is permitted.
2 Scratches that do not go through the plating surfaces are permitted.
3 a The pitot probe is serviceable in the conditions that follow:
- If there is usual discoloration of the plating
- If the missing plating on the strut is less than 25.40 mm (1.0 in.) from the leading edge
- If the plating on the baseplate is missing.
- If it is not possible to read the model number on the strut label
- If the missing plating on the strut is more than 25.40 mm (1.0 in.) from the leading edge.
1 Make sure that the raised surfaces are not more than 0.076 mm (0.003 in.) in height or 7.62 mm (0.3 in.) in length and/or width.
2 Make sure that the dents and/or scratches are not more than 0.13 mm (0.005 in.) in depth or 7.62 mm (0.3 in.) in length and/or width.
(c) Baseplate surface (mounting-flange clearance area):
1 Make sure that the dents, scratches and/or raised surfaces are not more than 0.25 mm (0.01 in.) in depth and/or height.
(d) Baseplate edge surface:
1 Make sure that the raised surfaces are not more than 0.25 mm (0.01 in.) in height.
2 Make sure that there are no sharp edges.
(e) Strut (top surface):
1 Make sure that the dents and/or scratches are not more than 0.25 mm (0.01 in.) in depth and/or height on the strut body and the leading edge.
2 Make sure that the dents are not more than 0.635 mm (0.025 in.) in depth, in an area of 645.16 mm2 (1.0 in.2) along the trailing edge.
(4) Pitot-probe edge/lip condition:
(a) Make sure that the pitot probe opening is in its initial configuration, without deformation or dent, to get the maximum precision at very high Angle of Attack (AOA).
(b) If the results of the visual inspection of the pitot tube are unsatisfactory, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(c) 1 The leading edge lip of the pitot probe opening is sharp. The new pitot probes are sharper to have a maximum flat thickness of 0.254 mm (0.010 in.). If the pitot probe lip has erosion or a dent with a flat thickness of more than 0.635 mm (0.025 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(d) 1 Examine the pitot probe lip for small inner dents that can have an effect on the roundness of the pitot probe opening.
2 If the pitot probe indentation is more than 1.524 mm (0.060 in.) from the nominal lip diameter of 10.668 mm (0.420 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(e) 1 Examine the outer surface of the pitot-probe lip edge to make sure that it is smooth.
2 Examine for curled or flared-out pitot-probe lip-edge. Move your fingernail along the outer surface of the pitot probe lip to find the curled or flared-out edge.
3 If the pitot probe is curled or flared-out more than 1.270 mm (0.050 in.) and if the maximum measured lip diameter is more than 11.938 mm (0.470 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(f) 1 Examine the leading edge of the pitot probe lip for small nicks or chips.
a If two or more of the nicks are between 1.270 mm (0.050 in.) and 0.060 in. (1.524 mm) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
b If one nick is more than 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
A. Inspection/Check of the Pitot Probe (9DA1,9DA2,9DA3)
(1) Do a general visual inspection of the pitot probe for:
(a) Color:
1 After some time, the pitot probe tube becomes brown and/or black. This change in color has no effect on the operation of the pitot probe.
(b) Internal blockage:
a If the pitot probe is not clean, remove it (Ref. AMM TASK 34-11-15-000-001).
b Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY line has an oil trap to make sure that no oil goes into the pitot probe.
c Use the AIR SOURCE - REGULATED, FILTERED, DRY to blow air (maximum air pressure: 60 psi (4.14 bar)) into the pitot probe tube through the pneumatic connector. Make sure that the air comes out from the pitot-probe tube inlet.
d Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(c) Cleaning of the external surfaces:
2 Use the WATER SOURCE - GROUND and soak the pitot probe tube in clean water, or clean it with a Textile-Lint free Cotton - (Material No.14SBA1) soaked in tap water or the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) to remove the unwanted material from the pitot probe tube.
3 Clean the electrical connector with the BRUSH - BRISTLED, SOFT or a Textile-Lint free Cotton - (Material No.14SBA1) .
4 Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(d) External condition:
1 Make sure that the pitot probe tube is not bent and that it has no holes or cracks. If you find damage, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
2 If there are signs of lightning strike (burn marks, spots, other damage/signs) on one of the pitot probes, replace it (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
3 If the protective cover is melted on the pitot probe, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(e) Make sure that the drain holes are not blocked. If they are blocked, flush the total pressure lines as follows:
(3) General pitot-probe condition:
(a) Plating:
2 Scratches that do not go through the plating surfaces are permitted.
(b) Baseplate (mounting flange area):
1 Make sure that the raised surfaces are not more than 0.076 mm (0.003 in.) in height or 7.62 mm (0.3 in.) in length and/or width.
2 Make sure that the dents and/or scratches are not more than 0.127 mm (0.005 in.) in depth or 7.62 mm (0.3 in.) in length and/or width.
(c) Baseplate surface (mounting-flange clearance area):
1 Make sure that the dents, scratches and/or raised surfaces are not more than 0.25 mm (0.01 in.) in depth and/or height.
(d) Baseplate edge surface:
1 Make sure that the raised surfaces are not more than 0.25 mm (0.01 in.) in height.
2 Make sure that there are no sharp edges.
(e) Strut (top surface):
1 Make sure that the dents and/or scratches are not more than 0.25 mm (0.01 in.) in depth and/or height on the strut body and the leading edge.
2 Make sure that the dents are not more than 0.635 mm (0.025 in.) in depth, in an area of 645.16 mm2 (1.0 in.2) along the trailing edge.
(4) Pitot-probe edge/lip condition:
(a) Make sure that the pitot probe opening is in its initial configuration, without deformation or dent, to get the maximum precision at very high Angle of Attack (AOA).
(b) If the results of the visual inspection of the pitot tube are unsatisfactory, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(c) 1 The leading edge lip of the pitot probe opening is sharp. The new pitot probes are sharper to have a maximum flat thickness of 0.203 mm (0.008 in.). If the pitot probe lip has erosion or a dent with a flat thickness of more than 0.381 mm (0.015 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(d) 1 Examine the pitot probe lip for small inner dents that can have an effect on the roundness of the pitot probe opening.
2 If the pitot probe indentation is more than 0.762 mm (0.030 in.) from the nominal lip diameter of 6.985 mm (0.275 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(e) 1 Examine the outer surface of the pitot-probe lip edge to make sure that it is smooth.
2 Examine for curled or flared-out pitot-probe lip-edge. Move your fingernail along the outer surface of the pitot probe lip to find the curled or flared-out edge.
3 If the pitot probe is curled or flared-out more than 0.762 mm (0.030 in.) and if the maximum measured lip diameter is more than 7.747 mm (0.305 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(f) 1 Examine the leading edge of the pitot probe lip for small nicks or chips.
a If two or more nicks are more than 1.270 mm (0.050 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
b If one nick is more than 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(g) 1 Make sure that the angle between the pitot lip and the axis of the pitot probe tube is less than two degrees. This is equivalent to a maximum side-to-side difference of 0.381 mm (0.015 in.).
5. Close-up(1) Do a general visual inspection of the pitot probe for:
(a) Color:
1 After some time, the pitot probe tube becomes brown and/or black. This change in color has no effect on the operation of the pitot probe.
(b) Internal blockage:
CAUTION:
DO NOT USE SHARP AND/OR METAL TOOLS OR OBJECTS TO CLEAN THE PITOT PROBE. SUCH TOOLS OR OBJECTS CAN CAUSE DAMAGE TO THE PITOT PROBE.
1 Make sure that the pitot probe is clean and that it has no blockage:a If the pitot probe is not clean, remove it (Ref. AMM TASK 34-11-15-000-001).
b Make sure that the AIR SOURCE - REGULATED, FILTERED, DRY line has an oil trap to make sure that no oil goes into the pitot probe.
c Use the AIR SOURCE - REGULATED, FILTERED, DRY to blow air (maximum air pressure: 60 psi (4.14 bar)) into the pitot probe tube through the pneumatic connector. Make sure that the air comes out from the pitot-probe tube inlet.
d Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(c) Cleaning of the external surfaces:
CAUTION:
MAKE SURE THAT THE PITOT TUBE IS NOT EXPOSED TO CONTAMINATION, LUBRICATING OIL OR GREASE. IF YOU DO NOT OBEY THIS INSTRUCTION, CONTAMINATION OF THE TOTAL PRESSURE CIRCUITS OR DAMAGE TO THE PITOT TUBE CAN OCCUR.
CAUTION:
USE ONLY WATER AND ISOPROPYL ALCOHOL AS CLEANING AGENTS. DO NOT USE OTHER SOLVENTS OR CLEANERS BECAUSE THEY CAN BE NOT COMPATIBLE WITH THE PITOT TUBE MATERIAL. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PITOT TUBE CAN OCCUR.
CAUTION:
DO NOT SCOUR THE PITOT TUBE CONTOUR OR USE ABRASIVE MATERIAL ON IT. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PITOT TUBE CAN OCCUR.
1 Remove the pitot probe (Ref. AMM TASK 34-11-15-000-001).2 Use the WATER SOURCE - GROUND and soak the pitot probe tube in clean water, or clean it with a Textile-Lint free Cotton - (Material No.14SBA1) soaked in tap water or the Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) to remove the unwanted material from the pitot probe tube.
3 Clean the electrical connector with the BRUSH - BRISTLED, SOFT or a Textile-Lint free Cotton - (Material No.14SBA1) .
4 Install the pitot probe (Ref. AMM TASK 34-11-15-400-001).
(d) External condition:
1 Make sure that the pitot probe tube is not bent and that it has no holes or cracks. If you find damage, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
2 If there are signs of lightning strike (burn marks, spots, other damage/signs) on one of the pitot probes, replace it (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
3 If the protective cover is melted on the pitot probe, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(e) Make sure that the drain holes are not blocked. If they are blocked, flush the total pressure lines as follows:
- For pitot probe(s) 1 and/or 2 (Ref. AMM TASK 34-10-00-170-001).
- For pitot probe 3 (Ref. AMM TASK 34-22-25-170-001) (only the standby total-pressure-line part).
(3) General pitot-probe condition:
(a) Plating:
NOTE: The strut and the baseplate are the only plated surfaces on this pitot tube.
1 Usual discoloration of the plating is permitted.2 Scratches that do not go through the plating surfaces are permitted.
(b) Baseplate (mounting flange area):
1 Make sure that the raised surfaces are not more than 0.076 mm (0.003 in.) in height or 7.62 mm (0.3 in.) in length and/or width.
2 Make sure that the dents and/or scratches are not more than 0.127 mm (0.005 in.) in depth or 7.62 mm (0.3 in.) in length and/or width.
(c) Baseplate surface (mounting-flange clearance area):
1 Make sure that the dents, scratches and/or raised surfaces are not more than 0.25 mm (0.01 in.) in depth and/or height.
(d) Baseplate edge surface:
1 Make sure that the raised surfaces are not more than 0.25 mm (0.01 in.) in height.
2 Make sure that there are no sharp edges.
(e) Strut (top surface):
1 Make sure that the dents and/or scratches are not more than 0.25 mm (0.01 in.) in depth and/or height on the strut body and the leading edge.
2 Make sure that the dents are not more than 0.635 mm (0.025 in.) in depth, in an area of 645.16 mm2 (1.0 in.2) along the trailing edge.
(4) Pitot-probe edge/lip condition:
(a) Make sure that the pitot probe opening is in its initial configuration, without deformation or dent, to get the maximum precision at very high Angle of Attack (AOA).
(b) If the results of the visual inspection of the pitot tube are unsatisfactory, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(c) 1 The leading edge lip of the pitot probe opening is sharp. The new pitot probes are sharper to have a maximum flat thickness of 0.203 mm (0.008 in.). If the pitot probe lip has erosion or a dent with a flat thickness of more than 0.381 mm (0.015 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(d) 1 Examine the pitot probe lip for small inner dents that can have an effect on the roundness of the pitot probe opening.
2 If the pitot probe indentation is more than 0.762 mm (0.030 in.) from the nominal lip diameter of 6.985 mm (0.275 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(e) 1 Examine the outer surface of the pitot-probe lip edge to make sure that it is smooth.
2 Examine for curled or flared-out pitot-probe lip-edge. Move your fingernail along the outer surface of the pitot probe lip to find the curled or flared-out edge.
3 If the pitot probe is curled or flared-out more than 0.762 mm (0.030 in.) and if the maximum measured lip diameter is more than 7.747 mm (0.305 in.), replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001). If you find dents around the pitot probe opening, make sure that these dents do not have an effect on more than one-fifth (20%) of the lip circumference.
(f) 1 Examine the leading edge of the pitot probe lip for small nicks or chips.
a If two or more nicks are more than 1.270 mm (0.050 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
b If one nick is more than 1.524 mm (0.060 in.) in depth, replace the pitot probe (Ref. AMM TASK 34-11-15-000-001) and (Ref. AMM TASK 34-11-15-400-001).
(g) 1 Make sure that the angle between the pitot lip and the axis of the pitot probe tube is less than two degrees. This is equivalent to a maximum side-to-side difference of 0.381 mm (0.015 in.).
Subtask 34-11-15-860-053-A
A. Put the aircraft back to its initial configuration.
(1) Install the cover on the pitot probe.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform.
Subtask 34-11-15-865-054-A (1) Install the cover on the pitot probe.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| FOR FIN: 9DA1 (PROBEPITOT, 1) | |||
| 49VU | ANTI ICE/PROBES/PITOT/1 | 3DA1 | D02 |
| FOR FIN: 9DA2 (PROBEPITOT, 2) | |||
| 122VU | ANTI ICE/PROBES/2/PITOT | 3DA2 | Y14 |
| FOR FIN: 9DA3 (PROBEPITOT, 3) | |||
| 122VU | ANTI ICE/PROBES/3/PITOT | 3DA3 | Z16 |