Visually Examine the Forward Crossover Beam Fitting [IAE]

TASK 78-30-10-200-001-A
Visually Examine the Forward Crossover Beam Fitting

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

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This task gives the procedure for the inspection of the forward crossover beam fitting.
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	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
400	POWER PLANT, NACELLES AND PYLONS
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
Forward Crossover Beam

3. Job Set-up
Subtask 78-30-10-941-050-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 78-30-10-010-050-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 78-30-10-040-050-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 78-30-10-010-051-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.
(a) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 78-30-10-110-050-A ** ON A/C NOT FOR ALL

E. Clean the Forward Crossover Beam Fitting
(1) Clean the forward crossover beam fitting with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) .

4. Procedure
Subtask 78-30-10-210-050-A ** ON A/C NOT FOR ALL

A. Examine the forward crossover beam fitting zones 1, 2 and 3.

Forward Crossover Beam ** ON A/C NOT FOR ALL

(1) Examine zones 1, 2 and 3 of the fitting for cracks per NSRM 54-30-00.
(2) Examine zones 1 and 2 of the fitting for gouges, scratches, nicks and abrasion or wear per NSRM 54-30-00.
(3) Examine zones 3 of the fitting for gouges, scratches, nicks and abrasion or wear per NSRM 54-30-00.

Subtask 78-30-10-210-051-A ** ON A/C NOT FOR ALL

B. Examine the Forward Crossover Beam Guide Pins (Tangs) Zone 4.
(1) Examine zones 4 for cracks broken or missing material per NSRM 54-30-00.

CAUTION: WHEN CLOSING THE THRUST REVERSER HALF IN ACCORDANCE WITH AMM 78-32-00-410-010, VISUALLY CHECK TO ENSURE THE V-BLADE IS PROPERLY ENGAGED WITH THE V-GROOVE BEFORE CLOSING ANY LATCHES. THE CROSSOVER BEAM TANGS HELP TO LOCATE THE V-BLADE INTO THE V-GROOVE WHEN CLOSING THE REVERSER HALF.

(2) Examine zones 4 for gouges, scratches, nicks and abrasions per NSRM 54-30-00.

5. Close-up
Subtask 78-30-10-410-050-A ** ON A/C NOT FOR ALL

A. Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 78-30-10-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 78-30-10-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) 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.
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:27:23 UTC