DOC AIRBUS | AMM A320FInstallation of the APU Access Door and the related Door Mechanism
TASK 52-41-22-400-001-A
Installation of the APU Access Door and the related Door Mechanism
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 52-41-22-010-051-A
Subtask 52-41-22-910-050-A ** ON A/C NOT FOR ALL
Subtask 52-41-22-410-051-A
[Rev.10 from 2021]
2026.04.01 01:45:07 UTC
Installation of the APU Access Door and the related Door Mechanism
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06AAA1) | Polysulfide Sealant_General Purpose Brushable - |
| (Material No.06BHG1) | Silicone Sealant-Firewall High Temp. - |
| (Material No.06LCG9) | Non Hardening Jointing Putty-Medium Temp. Area - - |
| (Material No.06LDG2) | Non Hardening Jointing Putty-High Temp. Area - Structure |
| (Material No.12AGC2) | Corrosion Preventive Compound-- Soft Film System |
| No specific | lockwire corrosion resistant steel 1.0 mm (0.0394 in.) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 315AL, 316AR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 24 | COTTER PIN | AIPC 52-41-04-31-050 |
| 28 | COTTER PIN | AIPC 52-41-04-31-380 |
| 38 | COTTER PIN | AIPC 52-41-04-32-050 |
| 17 | COTTER PIN | AIPC 52-41-22-01-120 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 49-16-45-400-002-A | Installation of the Air Intake Diffuser and Elbow (APS 3200) |
| TASK 49-16-45-400-003-A | Installation of the Air Intake Diffuser and Elbow (131-9(A)) |
| TASK 52-41-00-010-001-A | Open the APU Doors for Access |
| TASK 52-41-00-410-001-A | Close the APU Doors after Access |
| SRM 524122 | |
Subtask 52-41-22-010-051-A
A. Get Access
(1) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position below the APU compartment.
(2) Make sure that the WARNING NOTICE(S) is in the flight compartment to tell persons not to start the APU.
(3) Make sure that the APU access doors 315AL and 316AR are opened (Ref. AMM TASK 52-41-00-010-001).
Subtask 52-41-22-865-051-A (1) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position below the APU compartment.
(2) Make sure that the WARNING NOTICE(S) is in the flight compartment to tell persons not to start the APU.
(3) Make sure that the APU access doors 315AL and 316AR are opened (Ref. AMM TASK 52-41-00-010-001).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
Subtask 52-41-22-910-050-A ** ON A/C NOT FOR ALL
A. Preparation for Installation
Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL
Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolts (21), (33) and (41).
Subtask 52-41-22-350-051-B ** ON A/C NOT FOR ALL Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL (2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolts (21), (33) and (41).
B. Replacement of the Inner Skins, the Covers and the Trough
(1) Examine the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) for damage.
(2) If necessary , replace the inner skins (50), (52), and (55), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
(b) Remove the damaged components.
(3) Prepare the APU access door (4) as follows:
(a) Clean the component interfaces and the adjacent area.
(b) Apply a coat of the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) approx. 5.0 mm (0.1969 in.) wide to the mating surfaces of these overlapping joints:
(d) Apply the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the screws (57) and the washers (56).
(4) Install the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
(a) Put the replacement components in their installation position and attach them with the screws (57) and the washers (56).
(b) Apply the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the screws (57).
(c) For fire protection purposes apply a bead of the Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) to these junctions:
Subtask 52-41-22-910-050-B ** ON A/C NOT FOR ALL (1) Examine the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) for damage.
(2) If necessary , replace the inner skins (50), (52), and (55), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
NOTE: The inner skin (58) is riveted to the door structure SRM 524122 .
(a) Remove the screws (57) and the washers (56) from the APU access door (4). (b) Remove the damaged components.
(3) Prepare the APU access door (4) as follows:
(a) Clean the component interfaces and the adjacent area.
(b) Apply a coat of the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) approx. 5.0 mm (0.1969 in.) wide to the mating surfaces of these overlapping joints:
- inner skin to inner skin joints (see section C-C).
- inner skin to door structure joints (see section B-B).
(d) Apply the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the screws (57) and the washers (56).
(4) Install the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
(a) Put the replacement components in their installation position and attach them with the screws (57) and the washers (56).
(b) Apply the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the screws (57).
(c) For fire protection purposes apply a bead of the Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) to these junctions:
- inner skin to inner junctions (see section C-C).
- inner skin to door structure junctions (see section B-B).
C. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply the Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolts (21), (33) and (41).
Subtask 52-41-22-350-051-D ** ON A/C NOT FOR ALL (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply the Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolts (21), (33) and (41).
D. Replacement of the Inner Skins, the Covers and the Trough
(1) Examine the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) for damage.
(2) If necessary , replace the inner skins (50), (52), and (55), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
(b) Remove the damaged components.
(3) Prepare the APU access door (4) as follows:
(a) Clean the component interfaces and the adjacent area.
(b) Apply a coat of the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) approx. 5.0 mm (0.1969 in.) wide to the mating surfaces of these overlapping joints:
(d) Apply the Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the screws (57) and the washers (56).
(4) Install the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
(a) Put the replacement components in their installation position and attach them with the screws (57) and the washers (56).
(b) Apply the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the screws (57).
(c) For fire protection purposes apply a bead of the Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) to these junctions:
Subtask 52-41-22-420-050-A ** ON A/C NOT FOR ALL (1) Examine the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) for damage.
(2) If necessary , replace the inner skins (50), (52), and (55), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
NOTE: The inner skin (58) is riveted to the door structure SRM 524122 .
(a) Remove the screws (57) and the washers (56) from the APU access door (4). (b) Remove the damaged components.
(3) Prepare the APU access door (4) as follows:
(a) Clean the component interfaces and the adjacent area.
(b) Apply a coat of the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) approx. 5.0 mm (0.1969 in.) wide to the mating surfaces of these overlapping joints:
- inner skin to inner skin joints (see section C-C).
- inner skin to door structure joints (see section B-B).
(d) Apply the Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the screws (57) and the washers (56).
(4) Install the inner skins (50), (52), (55) and (58), the covers (51), (53), (59), (60) and (61) and the trough (54) as follows:
(a) Put the replacement components in their installation position and attach them with the screws (57) and the washers (56).
(b) Apply the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) to the screws (57).
(c) For fire protection purposes apply a bead of the Silicone Sealant-Firewall High Temp. - (Material No.06BHG1) to these junctions:
- inner skin to inner junctions (see section C-C).
- inner skin to door structure junctions (see section B-B).
E. Installation of the Door Linkage Mechanism
(1) Install the shift lever (35) on the fuselage fitting as follows:
(a) Put the shift lever (35) in position and attach it with the bolt (41), the washers (36) and the nut (37).
(b) Tighten the nut (37) and safety it with the new AIPC 52-41-04-32-050 COTTER PIN (38).
(c) Move the shift lever (35) so that you can install the pip-pin (39) correctly in the rigging hole.
(2) Install the spring assembly (26) to the structure fitting as follows:
(a) Put the fork fitting (42) in position and attach it with the bolt (21), the washers (22) and (23) and the nut (25).
(b) Tighten the nut (25) and safety it with the new AIPC 52-41-04-31-050 COTTER PIN (24).
(3) Put the control handle (32) in position to the shift lever (35) and attach it with the pip-pin (34).
(4) Assemble the connection lever (44) on the shift lever as follows:
(a) Put the connection lever (44) in position to the shift lever (35).
(b) If necessary, turn the screw-bolt (27) until the attachment holes of the connection lever (44) and the shift lever (35) align.
(c) Assemble the connection lever (44) with the washers (40) and the control handle (32) to the shift lever (35).
(d) Install the bolt (33), the bushes (31), the washer (30) and the nut (29).
(e) Tighten the nut (29) and safety it with the new AIPC 52-41-04-31-380 COTTER PIN (28).
(5) Set the spring assembly (26) under tension as follows:
(a) Make sure that the pip-pin (39) is correctly installed in the rigging hole of the fuselage bracket.
(b) Turn the screw -bolt (27) until its hexagon touches the extension screw part (43).
Subtask 52-41-22-420-050-B ** ON A/C NOT FOR ALL (1) Install the shift lever (35) on the fuselage fitting as follows:
(a) Put the shift lever (35) in position and attach it with the bolt (41), the washers (36) and the nut (37).
(b) Tighten the nut (37) and safety it with the new AIPC 52-41-04-32-050 COTTER PIN (38).
(c) Move the shift lever (35) so that you can install the pip-pin (39) correctly in the rigging hole.
(2) Install the spring assembly (26) to the structure fitting as follows:
(a) Put the fork fitting (42) in position and attach it with the bolt (21), the washers (22) and (23) and the nut (25).
(b) Tighten the nut (25) and safety it with the new AIPC 52-41-04-31-050 COTTER PIN (24).
(3) Put the control handle (32) in position to the shift lever (35) and attach it with the pip-pin (34).
(4) Assemble the connection lever (44) on the shift lever as follows:
(a) Put the connection lever (44) in position to the shift lever (35).
(b) If necessary, turn the screw-bolt (27) until the attachment holes of the connection lever (44) and the shift lever (35) align.
(c) Assemble the connection lever (44) with the washers (40) and the control handle (32) to the shift lever (35).
(d) Install the bolt (33), the bushes (31), the washer (30) and the nut (29).
(e) Tighten the nut (29) and safety it with the new AIPC 52-41-04-31-380 COTTER PIN (28).
(5) Set the spring assembly (26) under tension as follows:
(a) Make sure that the pip-pin (39) is correctly installed in the rigging hole of the fuselage bracket.
(b) Turn the screw -bolt (27) until its hexagon touches the extension screw part (43).
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(c) Safety the screw-bolt (27) with the lockwire corrosion resistant steel 1.0 mm (0.0394 in.) on the extension screw part (43). E. Installation of the Door Linkage Mechanism
(1) Install the shift lever (35) on the fuselage fitting as follows:
(a) Put the shift lever (35) in position and attach it with the bolt (41), the washers (36) and (45) and the nut (37).
(b) Tighten the nut (37) and safety it with the new AIPC 52-41-04-32-050 COTTER PIN (38).
(c) Move the shift lever (35) so that you can install the pip-pin (39) correctly in the rigging hole.
(2) Install the spring assembly (26) to the structure fitting as follows:
(a) Put the fork fitting (42) in position and attach it with the bolt (21), the washers (22) and (23) and the nut (25).
(b) Tighten the nut (25) and safety it with the new AIPC 52-41-04-31-050 COTTER PIN (24).
(3) Put the control handle (32) in position to the shift lever (35) and attach it with the pip-pin (34).
(4) Assemble the connection lever (44) on the shift lever as follows:
(a) Put the connection lever (44) in position to the shift lever (35).
(b) If necessary, turn the screw-bolt (27) until the attachment holes of the connection lever (44) and the shift lever (35) align.
(c) Assemble the connection lever (44) with the washers (40) and the control handle (32) to the shift lever (35).
(d) Install the bolt (33), the bushes (31), the washer (30) and the nut (29).
(e) Tighten the nut (29) and safety it with the new AIPC 52-41-04-31-380 COTTER PIN (28).
(5) Set the spring assembly (26) under tension as follows:
(a) Make sure that the pip-pin (39) is correctly installed in the rigging hole of the fuselage bracket.
(b) Turn the screw -bolt (27) until its hexagon touches the extension screw part (43).
Subtask 52-41-22-420-053-B ** ON A/C NOT FOR ALL (1) Install the shift lever (35) on the fuselage fitting as follows:
(a) Put the shift lever (35) in position and attach it with the bolt (41), the washers (36) and (45) and the nut (37).
(b) Tighten the nut (37) and safety it with the new AIPC 52-41-04-32-050 COTTER PIN (38).
(c) Move the shift lever (35) so that you can install the pip-pin (39) correctly in the rigging hole.
(2) Install the spring assembly (26) to the structure fitting as follows:
(a) Put the fork fitting (42) in position and attach it with the bolt (21), the washers (22) and (23) and the nut (25).
(b) Tighten the nut (25) and safety it with the new AIPC 52-41-04-31-050 COTTER PIN (24).
(3) Put the control handle (32) in position to the shift lever (35) and attach it with the pip-pin (34).
(4) Assemble the connection lever (44) on the shift lever as follows:
(a) Put the connection lever (44) in position to the shift lever (35).
(b) If necessary, turn the screw-bolt (27) until the attachment holes of the connection lever (44) and the shift lever (35) align.
(c) Assemble the connection lever (44) with the washers (40) and the control handle (32) to the shift lever (35).
(d) Install the bolt (33), the bushes (31), the washer (30) and the nut (29).
(e) Tighten the nut (29) and safety it with the new AIPC 52-41-04-31-380 COTTER PIN (28).
(5) Set the spring assembly (26) under tension as follows:
(a) Make sure that the pip-pin (39) is correctly installed in the rigging hole of the fuselage bracket.
(b) Turn the screw -bolt (27) until its hexagon touches the extension screw part (43).
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(c) Safety the screw-bolt (27) with the lockwire corrosion resistant steel 1.0 mm (0.0394 in.) on the extension screw part (43). F. Installation of the APU Access Door 316AR
(1) Make sure that the pip-pin (6) is correctly installed in the rigging hole of the fuselage bracket.
(3) Make sure that their attachment holes align and install the quick-release pins (9) into the mounting brackets (8).
(4) Install the bonding straps (10) with the bolts (12) and the washers (11) to the APU access door (4) (Ref. AMM TASK 20-28-00-912-802).
(5) Connect the door linkage mechanism with the APU access door (4) as follows:
(a) Apply a thin layer of the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolt (2), the washers (19) and the nut (18).
(b) Put the eye-end (1) in its installation position and attach it with the bolt (2), the washers (19) and the nut (18).
(c) Tighten the nut (18) and safety it with the new AIPC 52-41-22-01-120 COTTER PIN (17).
(d) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the head of the bolt (2) and the nut (18).
(6) Remove the pip-pin (6) from the rigging hole of fuselage fitting and put it in the stowage hole.
(7) If removed, install the air intake diffuser and the elbow:
Subtask 52-41-22-420-053-D ** ON A/C NOT FOR ALL (1) Make sure that the pip-pin (6) is correctly installed in the rigging hole of the fuselage bracket.
NOTE: The pip-pin (6) holds the spring assembly of the door linkage mechanism (which has a load of 260 daN (584.5031 lbf)) in its extended position if the APU access door (4) is removed.
(2) Put the APU access door (4) in position so that its hinge fittings (7) engage with the mounting bracket (8) of the fuselage. (3) Make sure that their attachment holes align and install the quick-release pins (9) into the mounting brackets (8).
(4) Install the bonding straps (10) with the bolts (12) and the washers (11) to the APU access door (4) (Ref. AMM TASK 20-28-00-912-802).
(5) Connect the door linkage mechanism with the APU access door (4) as follows:
(a) Apply a thin layer of the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolt (2), the washers (19) and the nut (18).
(b) Put the eye-end (1) in its installation position and attach it with the bolt (2), the washers (19) and the nut (18).
(c) Tighten the nut (18) and safety it with the new AIPC 52-41-22-01-120 COTTER PIN (17).
(d) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the head of the bolt (2) and the nut (18).
(6) Remove the pip-pin (6) from the rigging hole of fuselage fitting and put it in the stowage hole.
(7) If removed, install the air intake diffuser and the elbow:
- For APU GTCP 36-300 (Ref. AMM D/O 49-16-45-40)
- For APU APS 3200 (Ref. AMM TASK 49-16-45-400-002)
- For APU 131-9(A) (Ref. AMM TASK 49-16-45-400-003).
F. Installation of the APU Access Door 316AR
(1) Make sure that the pip-pin (6) is correctly installed in the rigging hole of the fuselage bracket.
(3) Make sure that their attachment holes align and install the quick-release pins (9) into the mounting brackets (8).
(4) Install the bonding straps (10) with the bolts (12) and the washers (11) to the APU access door (4) (Ref. AMM TASK 20-28-00-912-802).
(5) Connect the door linkage mechanism with the APU access door (4) as follows:
(a) Apply a thin layer of the Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolt (2), the washers (19) and the nut (18).
(b) Put the eye-end (1) in its installation position and attach it with the bolt (2), the washers (19) and the nut (18).
(c) Tighten the nut (18) and safety it with the new AIPC 52-41-22-01-120 COTTER PIN (17).
(d) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the head of the bolt (2) and the nut (18).
(6) Remove the pip-pin (6) from the rigging hole of fuselage fitting and put it in the stowage hole.
(7) If removed, install the air intake diffuser and the elbow:
Subtask 52-41-22-820-050-A (1) Make sure that the pip-pin (6) is correctly installed in the rigging hole of the fuselage bracket.
NOTE: The pip-pin (6) holds the spring assembly of the door linkage mechanism (which has a load of 260 daN (584.5031 lbf)) in its extended position if the APU access door (4) is removed.
(2) Put the APU access door (4) in position so that its hinge fittings (7) engage with the mounting bracket (8) of the fuselage. (3) Make sure that their attachment holes align and install the quick-release pins (9) into the mounting brackets (8).
(4) Install the bonding straps (10) with the bolts (12) and the washers (11) to the APU access door (4) (Ref. AMM TASK 20-28-00-912-802).
(5) Connect the door linkage mechanism with the APU access door (4) as follows:
(a) Apply a thin layer of the Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the bolt (2), the washers (19) and the nut (18).
(b) Put the eye-end (1) in its installation position and attach it with the bolt (2), the washers (19) and the nut (18).
(c) Tighten the nut (18) and safety it with the new AIPC 52-41-22-01-120 COTTER PIN (17).
(d) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the head of the bolt (2) and the nut (18).
(6) Remove the pip-pin (6) from the rigging hole of fuselage fitting and put it in the stowage hole.
(7) If removed, install the air intake diffuser and the elbow:
- For APU GTCP 36-300 (Ref. AMM D/O 49-16-45-40)
- For APU APS 3200 (Ref. AMM D/O 49-16-45-40)
- For APU 131-9(A) (Ref. AMM TASK 49-16-45-400-003).
G. Adjustment Procedure
(1) Close the APU access doors 316AR and 315AL (Ref. AMM TASK 52-41-00-410-001).
(2) Make sure that the locking hooks of the quick-release fasteners are correctly engaged in the clevises (14).
(3) Measure the force necessary to move the lever (16) of the latch (15) with the GAGE - SLIP.
(a) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(b) Loosen the nuts (13) and turn the clevises (14) in or out until the force is correct.
.
(d) Adjust the clevises (14) in the sequence front-rear-center.
Subtask 52-41-22-910-051-A (1) Close the APU access doors 316AR and 315AL (Ref. AMM TASK 52-41-00-410-001).
(2) Make sure that the locking hooks of the quick-release fasteners are correctly engaged in the clevises (14).
(3) Measure the force necessary to move the lever (16) of the latch (15) with the GAGE - SLIP.
NOTE: The force must be between 8.0 daN (17.9847 lbf) and 18.0 daN (40.4656 lbf) and is measured 90 mm (3.5433 in.) from the rear end of the latch (15).
(4) If the force is out of tolerance, adjust the clevises (14) as follows: (a) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(b) Loosen the nuts (13) and turn the clevises (14) in or out until the force is correct.
NOTE: When you adjust the force, try at the upper tolerance limit.
(c) TORQUE the nuts (13) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft ) . (d) Adjust the clevises (14) in the sequence front-rear-center.
H. Preparation after Installation
Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL
Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL
(1) Seal the head of the bolt (33) and the nut (29) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) .
(2) Apply to the heads of the bolts (21) ,(33) ,(41) and to the nuts (25),(29),(37) Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) .
5. Close-up Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL Door Mechanism of APU Access Door 316AR ** ON A/C NOT FOR ALL (2) Apply to the heads of the bolts (21) ,(33) ,(41) and to the nuts (25),(29),(37) Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) .
Subtask 52-41-22-410-051-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the APU access doors 316AR 315AL (Ref. AMM TASK 52-41-00-410-001).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 52-41-22-865-052-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the APU access doors 316AR 315AL (Ref. AMM TASK 52-41-00-410-001).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).