<< >> NASA ASRS Report 399770, April 1998

Large transport aircraft had an attitude director indicator (ADI) inoperative and had been MEL'd. Flight crew later discovered that it was improperly MEL'd.

Attributes
ACN	399770
Time
Date	199804
Day	Tue
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
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 4500 flight time type : 100
ASRS Report	399770
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Upon arriving at aircraft discussed with captain MEL items -- captain's ADI flag was MEL'd. Later in flight I noticed a dmi MEL sticker on the overhead panel -- vertical gyro 'captain on altitude' selected. I asked the captain about this and he stated that he forgot to brief me on this MEL item. I asked can we MEL an ADI, and he stated yes, the other crew and maintenance checked the MEL as okay. Upon further investigation we determined that maintenance and the previous crews had improperly MEL'd this item. This is the last time I will take maintenance's word. I will verify the procedure for myself from here on out.

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Original NASA ASRS Text

Title: LGT ACFT HAD AN ATTITUDE DIRECTOR INDICATOR (ADI) INOP AND HAD BEEN MEL'D. FLT CREW LATER DISCOVERED THAT IT WAS IMPROPERLY MEL'D.

Narrative: UPON ARRIVING AT ACFT DISCUSSED WITH CAPT MEL ITEMS -- CAPT'S ADI FLAG WAS MEL'D. LATER IN FLT I NOTICED A DMI MEL STICKER ON THE OVERHEAD PANEL -- VERTICAL GYRO 'CAPT ON ALT' SELECTED. I ASKED THE CAPT ABOUT THIS AND HE STATED THAT HE FORGOT TO BRIEF ME ON THIS MEL ITEM. I ASKED CAN WE MEL AN ADI, AND HE STATED YES, THE OTHER CREW AND MAINT CHECKED THE MEL AS OKAY. UPON FURTHER INVESTIGATION WE DETERMINED THAT MAINT AND THE PREVIOUS CREWS HAD IMPROPERLY MEL'D THIS ITEM. THIS IS THE LAST TIME I WILL TAKE MAINT'S WORD. I WILL VERIFY THE PROC FOR MYSELF FROM HERE ON OUT.

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.