B757 captain describes two single engine returns on the same aircraft when an engine cannot be resta...

Narrative:

Two [functional check flights] on two consecutive days after contractor heavy maintenance; on the same aircraft. Both days returned single engine due to engine valve discrete while placing fuel control switch to run for inflight restart. After first flight contractor replaced ffg [fuel flow governor]. Fix failed to rectify problem resulting in second single engine return. Engineering evaluating replacement of lp/hp engine driven fuel pumps. Technical crew chiefs provided excellent inflight assistance; evaluation and system debrief to maintenance. Placement of company technical crew chiefs (avionics and systems) should be standard practice on all fcf's after contractor maintenance. Their input is invaluable during [irregular flight operations] and for system debrief to the contractor postflight for a positive fix so as to avert a repeat occurrence.

Original NASA ASRS Text

Title: B757 Captain describes two single engine returns on the same aircraft when an engine cannot be restarted in flight during a maintenance test flight after Contractor Maintenance.

Narrative: Two [Functional Check Flights] on two consecutive days after contractor heavy maintenance; on the same aircraft. Both days returned single engine due to engine valve discrete while placing fuel control switch to run for inflight restart. After first flight contractor replaced FFG [Fuel Flow Governor]. Fix failed to rectify problem resulting in second single engine return. Engineering evaluating replacement of LP/HP engine driven fuel pumps. Technical crew chiefs provided excellent inflight assistance; evaluation and system debrief to Maintenance. Placement of company technical crew chiefs (Avionics and Systems) should be standard practice on all FCF's after Contractor Maintenance. Their input is invaluable during [irregular flight operations] and for system debrief to the contractor postflight for a positive fix so as to avert a repeat occurrence.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1091338
Time
Date	201305
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Component
Aircraft Component	Powerplant Fuel Valve
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

B757 captain describes two single engine returns on the same aircraft when an engine cannot be restarted in flight during a maintenance test flight after contractor maintenance.