A B767-200ER was dispatched on an overwater trip returned to the field with the air driven hydraulic pump deferred per the MEL.

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Attributes
ACN	596047
Time
Date	200309
Day	Tue
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
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	596047
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : published procedure non adherence : far
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : manuals performance deficiency : non compliance with legal requirements performance deficiency : logbook entry
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

Adp (air driven pump) inoperative per MEL 29-04A. Aircraft ground interrupt due adp completely inoperative. Changed over to 29-03 and retained fix at 7 days. Did not need pump as aircraft routed domestic. No international flight.

Original NASA ASRS Text

Title: A B767-200ER WAS DISPATCHED ON AN OVERWATER TRIP RETURNED TO THE FIELD WITH THE AIR DRIVEN HYD PUMP DEFERRED PER THE MEL.

Narrative: ADP (AIR DRIVEN PUMP) INOP PER MEL 29-04A. ACFT GND INTERRUPT DUE ADP COMPLETELY INOP. CHANGED OVER TO 29-03 AND RETAINED FIX AT 7 DAYS. DID NOT NEED PUMP AS ACFT ROUTED DOMESTIC. NO INTL FLT.

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.