DC9 experiences multiple compressor stalls in #2 engine. Declare emergency and divert to syr.

Attributes
ACN	593048
Time
Date	200309
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : cfb.vortac
State Reference	NY
Altitude	msl single value : 31000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 125 flight time total : 14500 flight time type : 7000
ASRS Report	593048
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Noticed on climb out that #2 engine's EPR did not match #1's and was running at a hotter temperature than normal. PNF (captain) adjusted the power of #2 engine to keep within operating limits. We noted the difference in power settings and were preparing them in order to write-up the engine upon arrival at dtw. Shortly after climb out at cruise in smooth air, I felt a slight rumbling sound/vibration and them #2 engine experienced 2-3 short (abrupt) compressor stalls. We pulled #2 power lever back towards idle (70% N1) and engine stabilized. Accomplished applicable procedures, descended to FL240 and after talking with air carrier dispatch, elected to divert to syr. Though the engine was still producing power (at reduced setting) we elected to declare an emergency in the event the engine let go on descent/landing. A normal ILS approach was conducted to runway 10 at syr. Upon landing and exiting the runway, #2 engine was shutdown and the emergency was cancelled. There was no damage to aircraft crew or passenger.

Original NASA ASRS Text

Title: DC9 EXPERIENCES MULTIPLE COMPRESSOR STALLS IN #2 ENG. DECLARE EMER AND DIVERT TO SYR.

Narrative: NOTICED ON CLBOUT THAT #2 ENG'S EPR DID NOT MATCH #1'S AND WAS RUNNING AT A HOTTER TEMP THAN NORMAL. PNF (CAPT) ADJUSTED THE PWR OF #2 ENG TO KEEP WITHIN OPERATING LIMITS. WE NOTED THE DIFFERENCE IN PWR SETTINGS AND WERE PREPARING THEM IN ORDER TO WRITE-UP THE ENG UPON ARR AT DTW. SHORTLY AFTER CLBOUT AT CRUISE IN SMOOTH AIR, I FELT A SLIGHT RUMBLING SOUND/VIBRATION AND THEM #2 ENG EXPERIENCED 2-3 SHORT (ABRUPT) COMPRESSOR STALLS. WE PULLED #2 PWR LEVER BACK TOWARDS IDLE (70% N1) AND ENG STABILIZED. ACCOMPLISHED APPLICABLE PROCS, DSNDED TO FL240 AND AFTER TALKING WITH ACR DISPATCH, ELECTED TO DIVERT TO SYR. THOUGH THE ENG WAS STILL PRODUCING PWR (AT REDUCED SETTING) WE ELECTED TO DECLARE AN EMER IN THE EVENT THE ENG LET GO ON DSCNT/LNDG. A NORMAL ILS APCH WAS CONDUCTED TO RWY 10 AT SYR. UPON LNDG AND EXITING THE RWY, #2 ENG WAS SHUTDOWN AND THE EMER WAS CANCELLED. THERE WAS NO DAMAGE TO ACFT CREW OR PAX.

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.