Publication deficiency -- MEL requirement -- air carrier crew finds that the MEL does not address ho...

Attributes
ACN	307008
Time
Date	199506
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ory
State Reference	FO
Altitude	agl bound lower : 0 agl bound upper : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	307008
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	307009
Events
Anomaly	aircraft equipment problem : less severe aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Chart Or Publication
Air Traffic Incident	other
Situations
Publication	Unspecified

Narrative:

After a long delay maintenance placarded the left hand bleed overheat. There are numerous related references in the MEL. There is no reference for the confign of the bleed we left all bleeds opened and the APU running. Left xfeed open to run the left pack. In retrospect this may not have been correct since gear retraction was very slow. This may have been due to an additional malfunction of the air demand pump automatic mode but the confign may have contributed to the problem. Suggest bleed system confign be added to the MEL for this item. In addition maintenance placarded the hydraulic driven generator (heading). The wording in the MEL is not clear. I don't think this was required. Only that the heading not be required for the flight. All in all this was not a happy MEL experience. Callback conversation with reporter revealed the following: the captain was flying a B767-300 that had the left engine's high pressure bleed valve wired closed by maintenance. The MEL did not address what the proper bleed confign for takeoff should be for this condition. The flight crew did not realize, until it had happened, that the air driven pump that assists during gear retraction would be so affected by this problem. The MEL change is in progress at this company and in coordination with the manufacturer of course.

Original NASA ASRS Text

Title: PUB DEFICIENCY -- MEL REQUIREMENT -- ACR CREW FINDS THAT THE MEL DOES NOT ADDRESS HOW TO SET UP THE AIR BLEED CONFIGN FOR A PARTICULAR FAILURE MODE.

Narrative: AFTER A LONG DELAY MAINT PLACARDED THE L HAND BLEED OVERHEAT. THERE ARE NUMEROUS RELATED REFS IN THE MEL. THERE IS NO REF FOR THE CONFIGN OF THE BLEED WE LEFT ALL BLEEDS OPENED AND THE APU RUNNING. L XFEED OPEN TO RUN THE L PACK. IN RETROSPECT THIS MAY NOT HAVE BEEN CORRECT SINCE GEAR RETRACTION WAS VERY SLOW. THIS MAY HAVE BEEN DUE TO AN ADDITIONAL MALFUNCTION OF THE AIR DEMAND PUMP AUTO MODE BUT THE CONFIGN MAY HAVE CONTRIBUTED TO THE PROB. SUGGEST BLEED SYS CONFIGN BE ADDED TO THE MEL FOR THIS ITEM. IN ADDITION MAINT PLACARDED THE HYD DRIVEN GENERATOR (HDG). THE WORDING IN THE MEL IS NOT CLR. I DON'T THINK THIS WAS REQUIRED. ONLY THAT THE HDG NOT BE REQUIRED FOR THE FLT. ALL IN ALL THIS WAS NOT A HAPPY MEL EXPERIENCE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THE CAPT WAS FLYING A B767-300 THAT HAD THE L ENG'S HIGH PRESSURE BLEED VALVE WIRED CLOSED BY MAINT. THE MEL DID NOT ADDRESS WHAT THE PROPER BLEED CONFIGN FOR TKOF SHOULD BE FOR THIS CONDITION. THE FLC DID NOT REALIZE, UNTIL IT HAD HAPPENED, THAT THE AIR DRIVEN PUMP THAT ASSISTS DURING GEAR RETRACTION WOULD BE SO AFFECTED BY THIS PROB. THE MEL CHANGE IS IN PROGRESS AT THIS COMPANY AND IN COORD WITH THE MANUFACTURER OF COURSE.

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.

Publication deficiency -- MEL requirement -- air carrier crew finds that the MEL does not address how to set up the air bleed confign for a particular failure mode.