General Check of the P2/T2 Air Tubes [IAE]

TASK 73-22-48-200-010-A
General Check of the P2/T2 Air Tubes

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	LIGHT SOURCE - INSPECTION
No specific	AR	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 38.5 and 31.5 lbf.in (0.44 and 0.36 m.daN )
No specific	Torque wrench: range to between 145 and 135 lbf.in (1.64 and 1.53 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-22-48-000-010-A	Removal of the P2T2 Probe Tube Assembly
TASK 73-22-48-400-010-A	Installation of the P2T2 Probe Tube/Hose Assembly
P2/T2 Air Tubes

3. Job Set-up
Subtask 73-22-48-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 73-22-48-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position.

Subtask 73-22-48-010-051-A ** ON A/C NOT FOR ALL

C. Remove the P2/T2 probe access panel

P2/T2 Air Tubes ** ON A/C NOT FOR ALL

(1) Remove the 18 bolts (2).
(2) Remove the access panel (1).

Subtask 73-22-48-110-050-A ** ON A/C NOT FOR ALL

D. Clean the P2/T2 tubes (3) and (4):

P2/T2 Air Tubes ** ON A/C NOT FOR ALL

(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with cleaning fluid (Material No.V01-002) (Ref 70-30-00) to clean the tubes.
(2) Dry the tubes with a clean Textile-Lint free Cotton - (Material No.14SBA1) .

4. Procedure
Subtask 73-22-48-210-050-A ** ON A/C NOT FOR ALL

A. Examination:
(1) Examine the tube (3) for twisting
(a) If the tube is twisted, replace it (Ref. AMM TASK 73-22-48-000-010) and (Ref. AMM TASK 73-22-48-400-010).
(2) Examine the tubes (3) and (4) for correct attachment

P2/T2 Air Tubes ** ON A/C NOT FOR ALL

(a) If the tubes are loose, TORQUE the tube connection nuts to between 145 and 135 lbf.in (1.64 and 1.53 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(3) Examine the general condition of the tubes (3) and (4). Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION.
(a) Examine the tubes for cracks.
1 If a tube is cracked, reject it.
(b) Examine the tubes for dents and damage.
1 If a tube has dents or damage, reject it.

5. Close-up
Subtask 73-22-48-410-050-A ** ON A/C NOT FOR ALL

A. Install the P2/T2 probe access panel

P2/T2 Air Tubes ** ON A/C NOT FOR ALL

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Put the access panel (1) on the air intake cowl, in the correct position for installation.
(3) Install the 18 bolts (2). TORQUE the bolts to between 38.5 and 31.5 lbf.in (0.44 and 0.36 m.daN )

Subtask 73-22-48-410-051-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:01:08 UTC