<< >> NASA ASRS Report 717494, November 2006

A CRJ200 on approach and level at 10000 ft heard a pop and airframe shudder. All engine indications normal except slight vibration rise in #2 engine. On ground; found fan blade damage to the right engine.

Attributes
ACN	717494
Time
Date	200611
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl bound lower : 7000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : korry 2
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 95 flight time total : 5200 flight time type : 4000
ASRS Report	717494
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : #2 engine vibes indication other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Cruise descent into ZZZ (from ZZZY) via the X arrival 300 KIAS assigned and indicated. Level at 10000 ft MSL; heard a pop and slight shudder through airplane in flight director (compared to gear extension post event) all engine indications normal with a slight rise in engine #2 vibe N1 indications. Throttles were reduced individually with no abnormalities noted -- speed reduced to 250 KIAS and clearance to 7000 ft MSL given and initiated. Normal approach and landing accomplished. No emergency was declared. Postflt inspection revealed engine fan blade damage to right engine. No evidence of bird strike or other object contact to airplane.

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Original NASA ASRS Text

Title: A CRJ200 ON APCH AND LEVEL AT 10000 FT HEARD A POP AND AIRFRAME SHUDDER. ALL ENG INDICATIONS NORMAL EXCEPT SLIGHT VIBRATION RISE IN #2 ENG. ON GND; FOUND FAN BLADE DAMAGE TO THE R ENG.

Narrative: CRUISE DSCNT INTO ZZZ (FROM ZZZY) VIA THE X ARR 300 KIAS ASSIGNED AND INDICATED. LEVEL AT 10000 FT MSL; HEARD A POP AND SLIGHT SHUDDER THROUGH AIRPLANE IN FLT DIRECTOR (COMPARED TO GEAR EXTENSION POST EVENT) ALL ENG INDICATIONS NORMAL WITH A SLIGHT RISE IN ENG #2 VIBE N1 INDICATIONS. THROTTLES WERE REDUCED INDIVIDUALLY WITH NO ABNORMALITIES NOTED -- SPD REDUCED TO 250 KIAS AND CLRNC TO 7000 FT MSL GIVEN AND INITIATED. NORMAL APCH AND LNDG ACCOMPLISHED. NO EMER WAS DECLARED. POSTFLT INSPECTION REVEALED ENG FAN BLADE DAMAGE TO R ENG. NO EVIDENCE OF BIRD STRIKE OR OTHER OBJECT CONTACT TO AIRPLANE.

Data retrieved from NASA's ASRS site as of January 2009 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.