<< >> NASA ASRS Report 961683, June 2011

Three mechanics and one inspector report about their involvement with a horizontal stabilizer jackscrew and trim cables removal and replacement (right/right) on a B737-700 aircraft. Forward pulleys for the stab trim cables in main electrical equipment (east/east) compartment were not reinstalled; causing aircraft damage.

Attributes
ACN	961683
Time
Date	201106
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Horizontal Stabilizer Control
Person 1
Function	Inspector
Qualification	Maintenance Airframe Maintenance Powerplant
Person 2
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

I have received a [company] letter informing me that two horizontal stabilizer pulleys; one for sta and one for stb cables; were left off [(not installed)] at sta 328 on aircraft.on shift turnover from day shift; horizontal stabilizer trim cable sta already installed by day shift mechanic and all access ceiling panels 'ok' to close before my shift.on my shift; we were to finish checking cable tension and to complete cable adjustment test according to jobcard XXXX and maintenance manual. Because my shift was the last shift to complete jobcard XXXX; I; [as inspector]; have to sign-off the remove and replace (right/right) jobcard for the horizontal stabilizer sta cable and I was not aware of any pulleys being removed and not being reinstalled.

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Original NASA ASRS Text

Title: Three mechanics and one Inspector report about their involvement with a horizontal stabilizer jackscrew and trim cables removal and replacement (R/R) on a B737-700 aircraft. Forward pulleys for the stab trim cables in main electrical equipment (E/E) compartment were not reinstalled; causing aircraft damage.

Narrative: I have received a [company] letter informing me that two horizontal stabilizer pulleys; one for STA and one for STB cables; were left off [(not installed)] at STA 328 on aircraft.On shift turnover from day shift; horizontal stabilizer trim cable STA already installed by day shift Mechanic and all access ceiling panels 'OK' to close before my shift.On my shift; we were to finish checking cable tension and to complete cable adjustment test according to jobcard XXXX and maintenance manual. Because my shift was the last shift to complete jobcard XXXX; I; [as Inspector]; have to sign-off the Remove and Replace (R/R) jobcard for the horizontal stabilizer STA cable and I was not aware of any pulleys being removed and not being reinstalled.

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.