An medium large transport air carrier crew had an internal failure of an engine.

Attributes
ACN	233975
Time
Date	199302
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lga airport : jfk
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach descent other landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 23000 flight time type : 19000
ASRS Report	233975
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 180 flight time total : 15600 flight time type : 3000
ASRS Report	233987
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During descent into lga we heard a loud bang in the cockpit. After evaluation we determined that the right engine was not developing normal thrust. The captain exercised his emergency authority and diverted to jfk for longer runway. We operated the engine at idle thrust until landing roll and then shut down normally. Maintenance inspection revealed last turbine stage failure and stator damage. The decision to keep the engine running was based on the fact that the only abnormal engine parameters were slightly lower EPR and N-1. The other indications were normal, fuel flow, oil pressure, egt and N-2. Also, the airport was only 8-10 mi away.

Original NASA ASRS Text

Title: AN MLG ACR CREW HAD AN INTERNAL FAILURE OF AN ENG.

Narrative: DURING DSCNT INTO LGA WE HEARD A LOUD BANG IN THE COCKPIT. AFTER EVALUATION WE DETERMINED THAT THE R ENG WAS NOT DEVELOPING NORMAL THRUST. THE CAPT EXERCISED HIS EMER AUTHORITY AND DIVERTED TO JFK FOR LONGER RWY. WE OPERATED THE ENG AT IDLE THRUST UNTIL LNDG ROLL AND THEN SHUT DOWN NORMALLY. MAINT INSPECTION REVEALED LAST TURBINE STAGE FAILURE AND STATOR DAMAGE. THE DECISION TO KEEP THE ENG RUNNING WAS BASED ON THE FACT THAT THE ONLY ABNORMAL ENG PARAMETERS WERE SLIGHTLY LOWER EPR AND N-1. THE OTHER INDICATIONS WERE NORMAL, FUEL FLOW, OIL PRESSURE, EGT AND N-2. ALSO, THE ARPT WAS ONLY 8-10 MI AWAY.

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.