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ASN Wikibase Occurrence # 40496
Last updated: 2 December 2021
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Type:Silhouette image of generic CP10 model; specific model in this crash may look slightly different
Mudry CAP 10B
Registration: N25AK
MSN: 56
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Fairchild Afb, WA -   United States of America
Phase: En route
Departure airport:WA (SKA)
Destination airport:
Investigating agency: NTSB
During recovery from a left hammerhead stall, the pilot of a French-built Mudry CAP 10B transmitted that he had a locked control. At about that time, the airplane entered a steep right bank and began descending. It remained in a descending turn for three steeply banked 360 degree right turns, then it impacted the ground. Videotapes revealed rudder and elevator movements during the descending turn, but no aileron movement was seen from the time the pilot said he had a locked control until the airplane hit the ground. Investigation revealed two three-wire electrical bundles in each wing, which had been routed to the wingtip strobe lights and the wingtip smoke canister activation system. These created a resistance to movement of the aileron pushpull tubes. The right wing wire bundles had been routed through the center of the right aileron bellcrank mechanism. Testing revealed that the wire bundles in the right wing could become lodged in the bellcrank mechanism, and could jam the ailerons in a position that would cause the airplane to roll to the right. Flight tests simulating this condition in another CAP 10B confirmed that the airplane was not controllable when the ailerons were jammed in such a position. The manufacturer reported that the 1975 model airplane was not equipped with strobe lights or a smoke canister system when it left the factory. The investigation did not determine who had routed the bundles through the right bellcrank or for how long they had been in that location. CAUSE: loss of control due to a jammed aileron pushpull tube, due to improper installation/routing of electrical wire bundles through the right aileron bellcrank mechanism by unknown person(s).



Revision history:

24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:23 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]

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