In-flight engine shutdown creates a near ground incident and near loss of aircraft control.

Attributes
ACN	207849
Time
Date	199204
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phx
State Reference	AZ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach landing other other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 2 flight time total : 4850
ASRS Report	207849
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 15000 flight time type : 3000
ASRS Report	207773
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

While at cruise (FL290) toward phx the crew noted an airframe vibration. After troubleshooting, it was determined to be caused by the #1 engine. After conferring with a maintenance coordinator, the decision was made for a precautionary shutdown. ZAB was notified of our situation and an emergency was declared. The flight attendants were notified and prepared the cabin. All pertinent checklists were read. We landed at phx without further incident. Supplemental information from acn 207773: I instructed first officer to reduce the engines to idle 1 at a time. Upon reducing #1 to idle, vibrations stopped. Advised center we were operating #1 at idle, but were not declaring an emergency at that time. Contacted maintenance coordination and flight control. Advised them of situation and that intended to execute a precautionary shutdown of #1. They concurred. Advised flight attendant to brief her crew on evacuate/evacuation procedures, should they be required. Made a PA to the passenger regarding our situation and eliciting the attention to any flight attendant instruction should conditions later warrant. Upon contact with phx approach control, ensured crash crew standing by. So reviewed engine out procedure and go around. Uneventful landing completed by first officer after assuring he was comfortable with the procedure. After landing, first officer reverted to normal after landing procedures as we made a 130 degree right turn off of the high speed. As we only had 1 'a' system pump, I encountered some degree of difficulty in completing that turn while the leading edge devices and flaps were retracting. This contingency with #1 or #2 engine inoperative needs addressing in the appropriate checklists so as to prevent some less fortunate souls from taking a trip into the grass. Believe me, this contingency was not foreseen by any crew member while involved with the press of events in such a time-compressed environment. Phx maintenance advised that the timely shutdown prevented severe damage to the engine due to a seal ingestion.

Original NASA ASRS Text

Title: INFLT ENG SHUTDOWN CREATES A NEAR GND INCIDENT AND NEAR LOSS OF ACFT CTL.

Narrative: WHILE AT CRUISE (FL290) TOWARD PHX THE CREW NOTED AN AIRFRAME VIBRATION. AFTER TROUBLESHOOTING, IT WAS DETERMINED TO BE CAUSED BY THE #1 ENG. AFTER CONFERRING WITH A MAINT COORDINATOR, THE DECISION WAS MADE FOR A PRECAUTIONARY SHUTDOWN. ZAB WAS NOTIFIED OF OUR SITUATION AND AN EMER WAS DECLARED. THE FLT ATTENDANTS WERE NOTIFIED AND PREPARED THE CABIN. ALL PERTINENT CHKLISTS WERE READ. WE LANDED AT PHX WITHOUT FURTHER INCIDENT. SUPPLEMENTAL INFO FROM ACN 207773: I INSTRUCTED FO TO REDUCE THE ENGS TO IDLE 1 AT A TIME. UPON REDUCING #1 TO IDLE, VIBRATIONS STOPPED. ADVISED CTR WE WERE OPERATING #1 AT IDLE, BUT WERE NOT DECLARING AN EMER AT THAT TIME. CONTACTED MAINT COORD AND FLT CTL. ADVISED THEM OF SITUATION AND THAT INTENDED TO EXECUTE A PRECAUTIONARY SHUTDOWN OF #1. THEY CONCURRED. ADVISED FLT ATTENDANT TO BRIEF HER CREW ON EVAC PROCS, SHOULD THEY BE REQUIRED. MADE A PA TO THE PAX REGARDING OUR SITUATION AND ELICITING THE ATTN TO ANY FLT ATTENDANT INSTRUCTION SHOULD CONDITIONS LATER WARRANT. UPON CONTACT WITH PHX APCH CTL, ENSURED CRASH CREW STANDING BY. SO REVIEWED ENG OUT PROC AND GAR. UNEVENTFUL LNDG COMPLETED BY FO AFTER ASSURING HE WAS COMFORTABLE WITH THE PROC. AFTER LNDG, FO REVERTED TO NORMAL AFTER LNDG PROCS AS WE MADE A 130 DEG R TURN OFF OF THE HIGH SPD. AS WE ONLY HAD 1 'A' SYS PUMP, I ENCOUNTERED SOME DEG OF DIFFICULTY IN COMPLETING THAT TURN WHILE THE LEADING EDGE DEVICES AND FLAPS WERE RETRACTING. THIS CONTINGENCY WITH #1 OR #2 ENG INOP NEEDS ADDRESSING IN THE APPROPRIATE CHKLISTS SO AS TO PREVENT SOME LESS FORTUNATE SOULS FROM TAKING A TRIP INTO THE GRASS. BELIEVE ME, THIS CONTINGENCY WAS NOT FORESEEN BY ANY CREW MEMBER WHILE INVOLVED WITH THE PRESS OF EVENTS IN SUCH A TIME-COMPRESSED ENVIRONMENT. PHX MAINT ADVISED THAT THE TIMELY SHUTDOWN PREVENTED SEVERE DAMAGE TO THE ENG DUE TO A SEAL INGESTION.

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.