<< >> NASA ASRS Report 457460, December 1999

A B737-300 with #2 engine power management control deferred as inoperative is operated in-flight and logbook reports operation ok. Maintenance clears the deferred item using the logbook for reference in violation of far.

Attributes
ACN	457460
Time
Date	199912
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 120 flight time total : 15000 flight time type : 11000
ASRS Report	457460
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other
Factors
Maintenance	performance deficiency : non compliance with legal requirements performance deficiency : logbook entry
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

Aircraft had a deferred #2 power management control inoperative per MEL. During cruise, I turned on the #2 power management control to verify and analyze the status of the inoperative light, button, and power management control. No faults or erratic engine operations were observed. After arriving at a company maintenance base, the observations of the #2 power maintenance control/engine parameters were explained to maintenance personnel. Maintenance elected to clear the deferral from the log. The air crew had no supporting document in either the MEL, QRH, or maintenance write-up, which in my opinion prohibited the analysis of the aircraft's status (#2 power management control).

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Original NASA ASRS Text

Title: A B737-300 WITH #2 ENG PWR MGMNT CTL DEFERRED AS INOP IS OPERATED INFLT AND LOGBOOK RPTS OP OK. MAINT CLRS THE DEFERRED ITEM USING THE LOGBOOK FOR REF IN VIOLATION OF FAR.

Narrative: ACFT HAD A DEFERRED #2 PWR MGMNT CTL INOP PER MEL. DURING CRUISE, I TURNED ON THE #2 PWR MGMNT CTL TO VERIFY AND ANALYZE THE STATUS OF THE INOP LIGHT, BUTTON, AND PWR MGMNT CTL. NO FAULTS OR ERRATIC ENG OPS WERE OBSERVED. AFTER ARRIVING AT A COMPANY MAINT BASE, THE OBSERVATIONS OF THE #2 PWR MAINT CTL/ENG PARAMETERS WERE EXPLAINED TO MAINT PERSONNEL. MAINT ELECTED TO CLR THE DEFERRAL FROM THE LOG. THE AIR CREW HAD NO SUPPORTING DOCUMENT IN EITHER THE MEL, QRH, OR MAINT WRITE-UP, WHICH IN MY OPINION PROHIBITED THE ANALYSIS OF THE ACFT'S STATUS (#2 PWR MGMNT CTL).

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.