A B737-200 was dispatched with the main landing gear maintenance isolation valve handles installed i...

Attributes
ACN	389517
Time
Date	199712
Day	Mon
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	389517
Person 2
Affiliation	company : air carrier
Function	other personnel other oversight : supervisor
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : less severe non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During a 'B' check, while reassembling the main landing gear isolation valve, both were installed 180 degrees from proper position. The valves passed operations check ok. Valves saftied (wired) to 'open' position as per job card. Failed to install valve safety cover. Aircraft dispatched in this manner. Later I discovered I was in error as I left the safety not secured. I notified line maintenance of my error, and they 'flagged' the error to be repaired at next opportunity. Maintenance found at dulles airport 'valve handles installed 180 degrees out.' reinstalled valve handles properly. Operations check normal. At no time, no one or aircraft was in danger.

Original NASA ASRS Text

Title: A B737-200 WAS DISPATCHED WITH THE MAIN LNDG GEAR MAINT ISOLATION VALVE HANDLES INSTALLED INCORRECTLY.

Narrative: DURING A 'B' CHK, WHILE REASSEMBLING THE MAIN LNDG GEAR ISOLATION VALVE, BOTH WERE INSTALLED 180 DEGS FROM PROPER POS. THE VALVES PASSED OPS CHK OK. VALVES SAFTIED (WIRED) TO 'OPEN' POS AS PER JOB CARD. FAILED TO INSTALL VALVE SAFETY COVER. ACFT DISPATCHED IN THIS MANNER. LATER I DISCOVERED I WAS IN ERROR AS I LEFT THE SAFETY NOT SECURED. I NOTIFIED LINE MAINT OF MY ERROR, AND THEY 'FLAGGED' THE ERROR TO BE REPAIRED AT NEXT OPPORTUNITY. MAINT FOUND AT DULLES ARPT 'VALVE HANDLES INSTALLED 180 DEGS OUT.' REINSTALLED VALVE HANDLES PROPERLY. OPS CHK NORMAL. AT NO TIME, NO ONE OR ACFT WAS IN DANGER.

Data retrieved from NASA's ASRS site as of July 2007 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 B737-200 was dispatched with the main landing gear maintenance isolation valve handles installed incorrectly.