General Visual Inspection of the Power Plant Drain Lines and Connectors [IAE]

TASK 71-70-00-200-010-A
General Visual Inspection of the Power Plant Drain Lines and Connectors

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

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 1M(3 FT)
No specific	1	LIGHT SOURCE - INSPECTION
No specific	1	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)

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, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
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 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Power Plant Drains

3. Job Set-up
Subtask 71-70-00-941-050-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 71-70-00-010-050-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 1M(3 FT) in to position.

Subtask 71-70-00-040-050-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser.

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 71-70-00-010-051-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 71-70-00-110-050-A ** ON A/C NOT FOR ALL

E. Clean the power-plant drains tubes

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

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

4. Procedure
Subtask 71-70-00-210-050-A ** ON A/C NOT FOR ALL

A. Examine the power-plant drains tubes
(1) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and make sure that these parts are serviceable:
(a) The lockwire.
(b) The tube connection nuts and unions.
(c) The bolts, the nuts, the clips and the brackets which attach the drain tubes to the engine.
(2) If any of the above parts are unserviceable, reject them.
(3) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the connections of the drain tubes for leaks. Leaks are not permitted
(a) If leaks are found, examine the tube connection nuts for loss of torque.
(4) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the general condition of the drain tubes
(a) Examine the tubes for cracks
1 If a tube is cracked, reject it.
(b) Examine the tubes for dents.
1 Dents with smooth contours which do not decrease the diameter of the tube more than 10 percent, accept the damage.
2 Dents with sharp contours or which decrease the diameter of the tube more than 10 percent, reject the tube.
3 Dents which are more than 1 in. (25.40 mm) apart and up to 0.05 in. (1.27 mm) deep with the radius of the dent not less than 0.056 in. (1.42 mm), accept the tube.
4 Dents which are less than 1 in. (25.40 mm) apart and more than 0.05 in. (1.27 mm) deep or the radius of the dent less than 0.056 in. (1.42 mm), reject the tube.
(c) Examine the tubes for nicks, scratches, scores and fretting
1 Up to 0.014 in. (0.36 mm) in depth with smooth contours, accept the damage.
2 Damage which does not have smooth contours or is more than 0.014 in. (0.36 mm) in depth, reject the tube.
(d) Examine the support lugs of the tubes
1 If a support lug is distorted or cracked, reject the tube.

5. Close-up
Subtask 71-70-00-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 71-70-00-440-050-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 71-70-00-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) 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.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 02:30:56 UTC