A mechanic reports installing the main landing gear (medium large transport) new alternate extension valve brackets in the wheel-well of a crj-900 aircraft per a task card. The bracket was later found not correctly positioned when a valve installer tried to align the push-pull rods for the valves with a bellcrank. Manual operation of the alternate gear extension would have been affected.

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Attributes
ACN	891394
Time
Date	201005
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Gear Extend/Retract Mechanism
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Events
Anomaly	Deviation - Procedural Maintenance

Narrative:

Installed new medium large transport (main landing gear) alt (alternate) extension valve brackets per task card. Took measurements with bracket temporally installed before permanently installed. The brackets are being said by the valve installer to be installed 1/2' or 1/4' out. This issue was caught on the second part of the task card where everything is permanently installed. The task card has you take the measurements two times: the first time with the valve temporally installed and the second with everything permanently installed.

Original NASA ASRS Text

Title: A Mechanic reports installing the main landing gear (MLG) new alternate extension valve brackets in the wheel-well of a CRJ-900 aircraft per a Task Card. The bracket was later found not correctly positioned when a valve Installer tried to align the push-pull rods for the valves with a bellcrank. Manual operation of the alternate gear extension would have been affected.

Narrative: Installed new MLG (Main Landing Gear) Alt (Alternate) extension valve brackets per Task Card. Took measurements with bracket temporally installed before permanently installed. The brackets are being said by the valve installer to be installed 1/2' or 1/4' out. This issue was caught on the second part of the Task Card where everything is permanently installed. The Task Card has you take the measurements two times: the first time with the valve temporally installed and the second with everything permanently installed.

Data retrieved from NASA's ASRS site as of April 2012 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.