Three mechanics; unfamiliar with the V2500 engine on A320 aircraft; report about their involvement w...

Attributes
ACN	1003987
Time
Date	201204
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Landing
Component
Aircraft Component	Reverser Lockout
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Person 2
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Procedural FAR

Narrative:

[I; mechanic X; was] assigned job card XXX-010 on an A320 aircraft in our hangar [in ZZZ]. [I] accomplished step-1 of job card on a V2500 engine. In part five of step-1; [job card states] make thrust reverser (T/right) unserviceable for maintenance (deactivate). Not being familiar with the V2500 engine thrust reverser system; we asked a fellow mechanic how to deactivate the T/right on the V2500. We used the hydraulic control unit (hcu) deactivation pin. After pinning hcu; verified [reverser] deactivation per aircraft maintenance manual (amm) 71-13-00. Thrust reversers did not deploy upon landing. Step-4 on job card [is a problem]. Suggest separate sign-offs and graphics for deactivation and activation in heavy maintenance visit (hmv). Manager notified.

Original NASA ASRS Text

Title: Three Mechanics; unfamiliar with the V2500 engine on A320 aircraft; report about their involvement with installing improper Thrust Reverser lockout pins in the Hydraulic Control Units (HCU). Reversers did not deploy on landing after aircraft was released from Heavy Maintenance Visit (HMV).

Narrative: [I; Mechanic X; was] assigned Job Card XXX-010 on an A320 aircraft in our Hangar [in ZZZ]. [I] accomplished Step-1 of Job Card on a V2500 engine. In Part Five of Step-1; [Job Card states] make Thrust Reverser (T/R) unserviceable for Maintenance (Deactivate). Not being familiar with the V2500 Engine Thrust Reverser System; we asked a fellow Mechanic how to deactivate the T/R on the V2500. We used the HYDRAULIC CONTROL UNIT (HCU) Deactivation pin. After pinning HCU; verified [reverser] deactivation per Aircraft Maintenance Manual (AMM) 71-13-00. Thrust Reversers did not deploy upon landing. Step-4 on Job Card [is a problem]. Suggest separate sign-offs and graphics for Deactivation and Activation in Heavy Maintenance Visit (HMV). Manager notified.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Three mechanics; unfamiliar with the V2500 engine on A320 aircraft; report about their involvement with installing improper thrust reverser lockout pins in the hydraulic control units (hcu). Reversers did not deploy on landing after aircraft was released from heavy maintenance visit (hmv).