<< >> NASA ASRS Report 355866, December 1996

A B747 was dispatched with an incomplete clear air turbulence check. #2 engine mount bolts not checked per the maintenance manual.

Attributes
ACN	355866
Time
Date	199612
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz
State Reference	US
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : bdl
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	355866
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other other : unspecified
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

On dec fri 1996 I was the airline's maintenance release mechanic on flight zz ZZZ-YYY. The aircraft came in with a write-up stating they had severe clear air turbulence for 10 mins. The mechanics assigned to me did the clear air turbulence check. On the #2 engine they were not able to open the l-hand reverser half to look at the engine mount bolt. I told the airline maintenance engineer that we were unable to open the reverser to do the check and he told me to note in the logbook that we were unable to open the reverser half to do the check and sign off the write-up for the clear air turbulence check which was done per maintenance manual. Listening to their maintenance engineer I thought it was ok to release the airplane in the way he told me to, but later I found out that this wasn't correct and the plane shouldn't have been released for service until the check was completed on the aircraft.

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Original NASA ASRS Text

Title: A B747 WAS DISPATCHED WITH AN INCOMPLETE CLR AIR TURB CHK. #2 ENG MOUNT BOLTS NOT CHKED PER THE MAINT MANUAL.

Narrative: ON DEC FRI 1996 I WAS THE AIRLINE'S MAINT RELEASE MECH ON FLT ZZ ZZZ-YYY. THE ACFT CAME IN WITH A WRITE-UP STATING THEY HAD SEVERE CLR AIR TURB FOR 10 MINS. THE MECHS ASSIGNED TO ME DID THE CLR AIR TURB CHK. ON THE #2 ENG THEY WERE NOT ABLE TO OPEN THE L-HAND REVERSER HALF TO LOOK AT THE ENG MOUNT BOLT. I TOLD THE AIRLINE MAINT ENGINEER THAT WE WERE UNABLE TO OPEN THE REVERSER TO DO THE CHK AND HE TOLD ME TO NOTE IN THE LOGBOOK THAT WE WERE UNABLE TO OPEN THE REVERSER HALF TO DO THE CHK AND SIGN OFF THE WRITE-UP FOR THE CLR AIR TURB CHK WHICH WAS DONE PER MAINT MANUAL. LISTENING TO THEIR MAINT ENGINEER I THOUGHT IT WAS OK TO RELEASE THE AIRPLANE IN THE WAY HE TOLD ME TO, BUT LATER I FOUND OUT THAT THIS WASN'T CORRECT AND THE PLANE SHOULDN'T HAVE BEEN RELEASED FOR SVC UNTIL THE CHK WAS COMPLETED ON THE ACFT.

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.