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ASN Wikibase Occurrence # 73887
Last updated: 17 November 2020
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Date:09-APR-2010
Time:
Type:Silhouette image of generic V22 model; specific model in this crash may look slightly different
Bell-Boeing CV-22B Osprey
Owner/operator:8th SOS / ISAF USAF (8th SOS / ISAF United States Air Force)
Registration: 06-0031
C/n / msn: D1012
Fatalities:Fatalities: 4 / Occupants: 20
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:11 km west of Qualat, Zabul -   Afghanistan
Phase: Approach
Nature:Military
Departure airport:
Destination airport:
Narrative:
On April 9, 2010, an Osprey assigned to Air Force Special Operations Command was preparing to drop off a squad of U.S. Army Rangers in southern Afghanistan when Both engines compressor stalled, causing the Osprey to go into a steep rate of descent. The tiltrotor was traveling at least 88 miles per hour — While configuring from the airplane mode to the helicopter mode. The Osprey did not respond to the pilot advancing the TCL’s to maximum power. The pilot quickly decided to attampt a roll/on landing in the desert. He made a perfect landing. During the roll-out, the nose gear assembly sheared off the airplane, causing the nose to bury into the sand. Eventually, the Osprey tipped forward on its nose, crushing the cockpit and immediately killing the pilot and flight engineer. The airplane skidded yo a halt - upside down - on it’s back. The flipping motion was the cause of death for an Army Ranger and an Afghan female interpreter assigned to the Ranger unit.the landing zone.

According to a press interview with the investigator: a sudden tailwind was a factor in causing the compressor stalls. The main factor was “turbine glassing” caused by sand ingestion into the engines. This was NOT a pilot error accident. It was a dual engine compressor stall accident. The vapor seen coming from the engines was fuel vapor - caused by engines being in the “auto-relight” mode.

After a brief personnel recovery operation, 2 A-10’s bombed the wreckage to keep it out of militants’ hands.

The official report's opinion was critical of the pilot.

Sources:

http://www.cbsnews.com/stories/2010/04/09/world/main6377920.shtml
https://www.wired.com/2012/10/air-force-silenced-general/
http://blogs.star-telegram.com/files/afsoc-crash-report---afd-101215-007.pdf


Revision history:

Date/timeContributorUpdates
09-Apr-2010 00:44 nikitas Added
09-Apr-2010 01:15 borgs011 Updated [Source]
09-Apr-2010 01:37 TB Updated [Aircraft type, Other fatalities]
09-Apr-2010 03:01 TB Updated [Aircraft type, Cn, Operator, Location]
09-Apr-2010 05:55 TB Updated [Aircraft type, Registration, Cn, Operator]
09-Apr-2010 05:59 TB Updated [Operator, Narrative]
09-Apr-2010 06:40 TB Updated [Operator]
09-Apr-2010 11:17 RobertMB Updated [Aircraft type, Cn, Operator, Narrative]
09-Apr-2010 11:42 RobertMB Updated [Aircraft type, Cn, Operator, Source, Narrative]
12-Apr-2012 03:29 TB Updated [Date, Registration, Cn, Source, Narrative]
12-Apr-2012 04:10 TB Updated [Source]
02-Jul-2015 11:39 Aerossurance Updated [Source, Narrative]
02-Jul-2015 12:21 Anon. Updated [Source, Narrative]
23-Dec-2019 17:06 Nepa Updated [Operator, Operator]
12-Aug-2020 06:22 Accident Investigati Updated [Total occupants, Narrative]

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