<< >> NASA ASRS Report 677081, November 2005

An EMB145 captain recommends an MEL procedure change on hydraulic pump deferrals from a 'check before departure' of the warning system to wording 'check prior to each departure.'

Attributes
ACN	677081
Time
Date	200511
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tower : las.tower
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	677081
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure
Independent Detector	aircraft equipment other aircraft equipment : elec emerg abnormal warn other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Factors
Maintenance	contributing factor : manuals performance deficiency : logbook entry performance deficiency : testing
Supplementary
Problem Areas	Aircraft Chart Or Publication Flight Crew Human Performance Maintenance Human Performance
Primary Problem	Chart Or Publication
Situations
Publication	MEL

Narrative:

MEL states: if the pumps 1C and 2C are inoperative; the message 'electrical emergency abnormal' must be verified to operate normally before departure. If the intent of the MEL is that this should be checked prior to every departure; then I think that the MEL should state; 'operate normally before each or prior to each departure.' as an example: '...vertical stabilizer prior to each departure.' the wording of MEL needs to be more clear. A pilot could think that this check only needs to be accomplished when he first gets into the aircraft.

Related reports:

• A pilot recommends a revision to the beech 1900-D MEL 22-2-2...

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Original NASA ASRS Text

Title: AN EMB145 CAPT RECOMMENDS AN MEL PROC CHANGE ON HYD PUMP DEFERRALS FROM A 'CHK BEFORE DEP' OF THE WARNING SYS TO WORDING 'CHK PRIOR TO EACH DEP.'

Narrative: MEL STATES: IF THE PUMPS 1C AND 2C ARE INOP; THE MESSAGE 'ELECTRICAL EMER ABNORMAL' MUST BE VERIFIED TO OPERATE NORMALLY BEFORE DEP. IF THE INTENT OF THE MEL IS THAT THIS SHOULD BE CHKED PRIOR TO EVERY DEP; THEN I THINK THAT THE MEL SHOULD STATE; 'OPERATE NORMALLY BEFORE EACH OR PRIOR TO EACH DEP.' AS AN EXAMPLE: '...VERT STABILIZER PRIOR TO EACH DEP.' THE WORDING OF MEL NEEDS TO BE MORE CLR. A PLT COULD THINK THAT THIS CHK ONLY NEEDS TO BE ACCOMPLISHED WHEN HE FIRST GETS INTO THE ACFT.

Data retrieved from NASA's ASRS site as of January 2009 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.