Medium large transport return land after aircraft vibration felt in acceleration mode.

Attributes
ACN	259607
Time
Date	199312
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dxo airport : dtw
State Reference	MI
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : dtw artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude other other
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
ASRS Report	259607
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time type : 700
ASRS Report	259608
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Consequence	other
Supplementary
Primary Problem	Aircraft

Narrative:

Climbing through 4000 ft MSL, accelerating through 210 KIAS, we experienced a loud airframe rumble. We leveled at 5000 ft, slowed the aircraft to 180 KIAS. The noise disappeared slowing through 190 KIAS. We returned to detroit after burning off excess weight. Landing was normal. Post-flight inspection revealed a cracked panel forward of the left acm inlet door.

Original NASA ASRS Text

Title: MLG RETURN LAND AFTER ACFT VIBRATION FELT IN ACCELERATION MODE.

Narrative: CLBING THROUGH 4000 FT MSL, ACCELERATING THROUGH 210 KIAS, WE EXPERIENCED A LOUD AIRFRAME RUMBLE. WE LEVELED AT 5000 FT, SLOWED THE ACFT TO 180 KIAS. THE NOISE DISAPPEARED SLOWING THROUGH 190 KIAS. WE RETURNED TO DETROIT AFTER BURNING OFF EXCESS WT. LNDG WAS NORMAL. POST-FLT INSPECTION REVEALED A CRACKED PANEL FORWARD OF THE L ACM INLET DOOR.

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.