<< >> NASA ASRS Report 622283, June 2003

A B737 flight crew notice a brake bleeder screw that was not safety wired. Maintenance said it was ok, flight crew found out that it was not after returning from a round-trip on the same aircraft.

Attributes
ACN	622283
Time
Date	200306
Day	Wed
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mynn.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 2000
ASRS Report	622283
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	maintenance problem : improper maintenance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

Captain arrived at aircraft and asked if I had ever noticed if the brake bleeder screws on main landing gear were safety-wired. He went out and preflted and noticed they weren't. Called maintenance. Maintenance researched it and said they weren't required to be safetied. Maintenance signed off logbook. We flew iah-sap-iah uneventfully. Today, jun/thu/03, captain calls my home and says that after more research, bleeder screws should have been safety wired and that, because of that, we flew an unairworthy, aircraft even though maintenance had signed off the logbook.

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Original NASA ASRS Text

Title: A B737 FLT CREW NOTICE A BRAKE BLEEDER SCREW THAT WAS NOT SAFETY WIRED. MAINT SAID IT WAS OK, FLT CREW FOUND OUT THAT IT WAS NOT AFTER RETURNING FROM A ROUND-TRIP ON THE SAME ACFT.

Narrative: CAPT ARRIVED AT ACFT AND ASKED IF I HAD EVER NOTICED IF THE BRAKE BLEEDER SCREWS ON MAIN LNDG GEAR WERE SAFETY-WIRED. HE WENT OUT AND PREFLTED AND NOTICED THEY WEREN'T. CALLED MAINT. MAINT RESEARCHED IT AND SAID THEY WEREN'T REQUIRED TO BE SAFETIED. MAINT SIGNED OFF LOGBOOK. WE FLEW IAH-SAP-IAH UNEVENTFULLY. TODAY, JUN/THU/03, CAPT CALLS MY HOME AND SAYS THAT AFTER MORE RESEARCH, BLEEDER SCREWS SHOULD HAVE BEEN SAFETY WIRED AND THAT, BECAUSE OF THAT, WE FLEW AN UNAIRWORTHY, ACFT EVEN THOUGH MAINT HAD SIGNED OFF THE LOGBOOK.

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.