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A B737 was dispatched in non compliance with the #1 generator deferred as inoperative per the MEL but special procedure disconnecting the constant speed drive omitted.
| Attributes | |
| ACN | 427408 |
| Time | |
| Date | 199902 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : cmh |
| State Reference | OH |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 240 flight time total : 10000 flight time type : 1400 |
| ASRS Report | 427408 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Our aircraft had a maintenance carry-over item (deferred per MEL), #1 generator placarded inoperative. We researched the requirements in our MEL. In part, the MEL required the constant speed drive to be disconnected and verified disconnected by maintenance. The logbook stated that MEL items were complied with. After takeoff, we noticed a high oil temperature light (associated with the #1 constant speed drive) illuminate. We called our company and were advised to try the constant speed drive disconnect switch. When we did, we immediately got the constant speed drive low pressure light, followed by a drop in constant speed drive oil temperature. The constant speed drive had apparently not been fully disconnected, putting us at risk of fire. The flight continued without further incident. Contract maintenance worked on the aircraft after it was secured and flight crew departed for hotel, preventing verbal description of problem. Also contract maintenance not as familiar with company procedures as company maintenance.
Original NASA ASRS Text
Title: A B737 WAS DISPATCHED IN NON COMPLIANCE WITH THE #1 GENERATOR DEFERRED AS INOP PER THE MEL BUT SPECIAL PROC DISCONNECTING THE CONSTANT SPD DRIVE OMITTED.
Narrative: OUR ACFT HAD A MAINT CARRY-OVER ITEM (DEFERRED PER MEL), #1 GENERATOR PLACARDED INOP. WE RESEARCHED THE REQUIREMENTS IN OUR MEL. IN PART, THE MEL REQUIRED THE CONSTANT SPD DRIVE TO BE DISCONNECTED AND VERIFIED DISCONNECTED BY MAINT. THE LOGBOOK STATED THAT MEL ITEMS WERE COMPLIED WITH. AFTER TKOF, WE NOTICED A HIGH OIL TEMP LIGHT (ASSOCIATED WITH THE #1 CONSTANT SPD DRIVE) ILLUMINATE. WE CALLED OUR COMPANY AND WERE ADVISED TO TRY THE CONSTANT SPD DRIVE DISCONNECT SWITCH. WHEN WE DID, WE IMMEDIATELY GOT THE CONSTANT SPD DRIVE LOW PRESSURE LIGHT, FOLLOWED BY A DROP IN CONSTANT SPD DRIVE OIL TEMP. THE CONSTANT SPD DRIVE HAD APPARENTLY NOT BEEN FULLY DISCONNECTED, PUTTING US AT RISK OF FIRE. THE FLT CONTINUED WITHOUT FURTHER INCIDENT. CONTRACT MAINT WORKED ON THE ACFT AFTER IT WAS SECURED AND FLC DEPARTED FOR HOTEL, PREVENTING VERBAL DESCRIPTION OF PROB. ALSO CONTRACT MAINT NOT AS FAMILIAR WITH COMPANY PROCS AS COMPANY MAINT.
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.