Engine shutdown and pressurization loss due to engine cowling loss on a DC8-62.

Attributes
ACN	471119
Time
Date	200004
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zlc.artcc
State Reference	MT
Altitude	msl single value : 37000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zlc.artcc
Operator	common carrier : air carrier
Make Model Name	DC-8 62
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 5000
ASRS Report	471119
Person 2
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 7050 flight time type : 5130
ASRS Report	471699
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : landed in emergency condition flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

In cruise at FL370 we heard a loud bang, the aircraft shook and began to lose pressurization. We donned oxygen masks and completed loss of pressurization checklist and initiated descent to 14000 ft. The engine instruments indicated a failure of #2 engine. We secured #2 engine via the engine failure checklist and declared an emergency with ZLC. We diverted to den and landed without further incident. Callback conversation with reporter revealed the following information: reporter said that the cowling separated from the #2 engine. The engine continued to run but instrument indications, because of wiring separating with the engine, indicated it was not. Decision was made to shut it down. Pressurization was lost when cowling struck the fuselage cutting 2 openings over the left wing with other parts striking and damaging the horizontal stabilizer. Company investigation has not determined why cowling came off.

Original NASA ASRS Text

Title: ENG SHUTDOWN AND PRESSURIZATION LOSS DUE TO ENG COWLING LOSS ON A DC8-62.

Narrative: IN CRUISE AT FL370 WE HEARD A LOUD BANG, THE ACFT SHOOK AND BEGAN TO LOSE PRESSURIZATION. WE DONNED OXYGEN MASKS AND COMPLETED LOSS OF PRESSURIZATION CHKLIST AND INITIATED DSCNT TO 14000 FT. THE ENG INSTS INDICATED A FAILURE OF #2 ENG. WE SECURED #2 ENG VIA THE ENG FAILURE CHKLIST AND DECLARED AN EMER WITH ZLC. WE DIVERTED TO DEN AND LANDED WITHOUT FURTHER INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR SAID THAT THE COWLING SEPARATED FROM THE #2 ENG. THE ENG CONTINUED TO RUN BUT INST INDICATIONS, BECAUSE OF WIRING SEPARATING WITH THE ENG, INDICATED IT WAS NOT. DECISION WAS MADE TO SHUT IT DOWN. PRESSURIZATION WAS LOST WHEN COWLING STRUCK THE FUSELAGE CUTTING 2 OPENINGS OVER THE L WING WITH OTHER PARTS STRIKING AND DAMAGING THE HORIZ STABILIZER. COMPANY INVESTIGATION HAS NOT DETERMINED WHY COWLING CAME OFF.

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.