A maintenance technician identified that other maintenance personnel had re-stowed an air driven gen...

Attributes
ACN	1062558
Time
Date	201301
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Hydraulic Auxiliary System Ram Air Turbine (RAT)
Person 1
Function	Technician
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

The crew reported the air driven generator (air driven generator) auto-deployed at altitude in mild turbulence. When I arrived at the aircraft the air driven generator was already re-stowed by other maintenance personnel. Upon inspection of the manually deployed air driven generator; I noticed the manual retraction pump reservoir contained no hydraulic fluid through the sight glass. The reservoir was serviced to the full level with hydraulic fluid. I cycled the air driven generator to the stowed position several times to bleed the system per the amm [aircraft maintenance manual]. With the reservoir and the system full; the air driven generator was completely in the stowed position.

Original NASA ASRS Text

Title: A maintenance technician identified that other maintenance personnel had re-stowed an Air Driven Generator (ADG) without verifying that the hydraulic reservoir had been serviced to full. He serviced the unit and bleed the system prior to completing the task.

Narrative: The crew reported the Air Driven Generator (ADG) auto-deployed at altitude in mild turbulence. When I arrived at the aircraft the ADG was already re-stowed by other maintenance personnel. Upon inspection of the manually deployed ADG; I noticed the manual retraction pump reservoir contained no hydraulic fluid through the sight glass. The reservoir was serviced to the full level with hydraulic fluid. I cycled the ADG to the stowed position several times to bleed the system per the AMM [Aircraft Maintenance Manual]. With the reservoir and the system full; the ADG was completely in the stowed position.

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.

A maintenance technician identified that other maintenance personnel had re-stowed an air driven generator (air driven generator) without verifying that the hydraulic reservoir had been serviced to full. He serviced the unit and bleed the system prior to completing the task.