A B737-800 was dispatched in non compliance with a left engine thrust reverser assembly installed on...

Attributes
ACN	474333
Time
Date	200005
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	B737-800
Operating Under FAR Part	Part 121
Flight Phase	ground : preflight ground : parked
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 5000 flight time type : 50
ASRS Report	474333
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : manuals contributing factor : schedule pressure performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : testing
Supplementary
Problem Areas	Maintenance Human Performance Chart Or Publication Aircraft
Primary Problem	Chart Or Publication
Situations
Publication	MAINTENANCE MANUAL

Narrative:

#1 reverser inadvertently installed on #2 engine. Reversers are identical except for a small fairing on top of reverser. The error was not discovered until after 1 flight had been flown. It was discovered when the part numbers removed did not match those issued. Corrective action: aircraft was grounded until correct parts installed. Callback conversation with reporter revealed the following information: the reporter stated the only difference between reversers was a small fairing or fin just under the leading edge devices on the inboard side of the engine. The reporter said the right engine thrust reverser had the fairing on the outboard side of the engine.

Original NASA ASRS Text

Title: A B737-800 WAS DISPATCHED IN NON COMPLIANCE WITH A L ENG THRUST REVERSER ASSEMBLY INSTALLED ON THE R ENG.

Narrative: #1 REVERSER INADVERTENTLY INSTALLED ON #2 ENG. REVERSERS ARE IDENTICAL EXCEPT FOR A SMALL FAIRING ON TOP OF REVERSER. THE ERROR WAS NOT DISCOVERED UNTIL AFTER 1 FLT HAD BEEN FLOWN. IT WAS DISCOVERED WHEN THE PART NUMBERS REMOVED DID NOT MATCH THOSE ISSUED. CORRECTIVE ACTION: ACFT WAS GNDED UNTIL CORRECT PARTS INSTALLED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ONLY DIFFERENCE BTWN REVERSERS WAS A SMALL FAIRING OR FIN JUST UNDER THE LEADING EDGE DEVICES ON THE INBOARD SIDE OF THE ENG. THE RPTR SAID THE R ENG THRUST REVERSER HAD THE FAIRING ON THE OUTBOARD SIDE OF THE ENG.

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.

A B737-800 was dispatched in non compliance with a left engine thrust reverser assembly installed on the right engine.