<< >> NASA ASRS Report 537255, December 2001

A saab 340B had an engine change using an engine that had parts robbed for other aircraft in service. Engine lasted 17 hours with the oil xfer tube missing.

Attributes
ACN	537255
Time
Date	200112
Day	Thu
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	artcc : lsas.artcc
Operator	common carrier : air carrier
Make Model Name	SF 340B
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : lead technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance lead technician : 21
ASRS Report	537255
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far
Independent Detector	aircraft equipment other aircraft equipment : oil pressure indicator
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : non availability of parts performance deficiency : testing performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Company
Primary Problem	Maintenance Human Performance

Narrative:

Dec/wed/01, B&B cover robbed for aircraft X l-hand side, from serviceable quick engine change. Later same day assembled cover was reinstalled on engine quick engine change without possibility of test run. Engine later installed on aircraft and low oil pressure reported after 17 hours, 15 cycles of operation. Oil xfer to be missing from B&B cover. Callback conversation with reporter revealed the following information: the reporter stated the B&B is the starter drive gearbox mounted on the top of the engine and the problem was the replacement of the cover assembly. The reporter said the build up of the assembly left out the oil xfer tube resulting in low oil pressure when the engine was operated on the airplane.

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Original NASA ASRS Text

Title: A SAAB 340B HAD AN ENG CHANGE USING AN ENG THAT HAD PARTS ROBBED FOR OTHER ACFT IN SVC. ENG LASTED 17 HRS WITH THE OIL XFER TUBE MISSING.

Narrative: DEC/WED/01, B&B COVER ROBBED FOR ACFT X L-HAND SIDE, FROM SERVICEABLE QUICK ENG CHANGE. LATER SAME DAY ASSEMBLED COVER WAS REINSTALLED ON ENG QUICK ENG CHANGE WITHOUT POSSIBILITY OF TEST RUN. ENG LATER INSTALLED ON ACFT AND LOW OIL PRESSURE RPTED AFTER 17 HRS, 15 CYCLES OF OP. OIL XFER TO BE MISSING FROM B&B COVER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE B&B IS THE STARTER DRIVE GEARBOX MOUNTED ON THE TOP OF THE ENG AND THE PROB WAS THE REPLACEMENT OF THE COVER ASSEMBLY. THE RPTR SAID THE BUILD UP OF THE ASSEMBLY LEFT OUT THE OIL XFER TUBE RESULTING IN LOW OIL PRESSURE WHEN THE ENG WAS OPERATED ON THE AIRPLANE.

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.