Air carrier medium large transport returned to service with transfer gear box cover plate missing.

Attributes
ACN	91404
Time
Date	198807
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : dal
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	ground : parked ground : preflight
Person 1
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	91404
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	other other : other
ASRS Report	91406
Events
Anomaly	aircraft equipment problem : critical non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : unable
Consequence	faa : investigated
Supplementary
Primary Problem	Airport
Air Traffic Incident	other

Narrative:

Transfer gear box plate removed and was not reinstalled prior to flight. No written procedure existed for this operation. Afterwards, a procedure was written. Callback conversation with reporter revealed the following: the problem was discovered approximately 20 mins after takeoff when engine oil pressure and quantity dropped to zero. Engine shut down and return/land. Reporter said he has been asked by FAA to submit a report. Supplemental information from acn 91406: area hidden by cowling after cowling replaced by another mechanic. Company promptly initiated a written procedure after event.

Original NASA ASRS Text

Title: ACR MLG RETURNED TO SERVICE WITH TRANSFER GEAR BOX COVER PLATE MISSING.

Narrative: TRANSFER GEAR BOX PLATE REMOVED AND WAS NOT REINSTALLED PRIOR TO FLT. NO WRITTEN PROC EXISTED FOR THIS OPERATION. AFTERWARDS, A PROC WAS WRITTEN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THE PROB WAS DISCOVERED APPROX 20 MINS AFTER TKOF WHEN ENG OIL PRESSURE AND QUANTITY DROPPED TO ZERO. ENG SHUT DOWN AND RETURN/LAND. RPTR SAID HE HAS BEEN ASKED BY FAA TO SUBMIT A RPT. SUPPLEMENTAL INFO FROM ACN 91406: AREA HIDDEN BY COWLING AFTER COWLING REPLACED BY ANOTHER MECH. COMPANY PROMPTLY INITIATED A WRITTEN PROC AFTER EVENT.

Data retrieved from NASA's ASRS site as of August 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.