# Incident 19971020033509I: Cessna 208B, Kasigluk, AK, October 20, 1997 - Type: FAA incident report (Accident/Incident Data System), as reported - Date: October 20, 1997, 10:30 local time - Place: Kasigluk, AK - Airport: Kasigluk Airport - Phase of flight: In Traffic Pattern-Circling - Operating rules: Air taxi and commuter (Part 135) - Operator: PNSA - Location: 60.8698° N, 162.5396° W: From the FAA, an estimate near the named town, within about 3 miles - Nearby events: https://openairdocs.org/map.md?lat=60.8698&lon=-162.5396&mi=10 - Aircraft: N9304F, registered now (https://openairdocs.org/aircraft/N9304F) (OpenAirDocs) - Registry model: Cessna 208 (registry code 2073702, https://openairdocs.org/model/cessna-208) (OpenAirDocs) - Registry engine: Pratt & Whitney PT6A series (registry code 52032, https://openairdocs.org/engine/pratt-whitney-pt6a-series) (OpenAirDocs) - Reported make and model: CESSNA 208B - People aboard: 1 - Fatal injuries: 0 - NTSB investigation: [NTSB ANC98IA004](https://openairdocs.org/ntsb/ANC98IA004) (OpenAirDocs) - FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/) - Page: https://openairdocs.org/incident/19971020033509I ## Narrative As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^. NARRATIVE: ON OCTOBER 20, 1997, ABOUT 1030 ALASKA DAYLIGHT TIME, THE PILOT OF A CESSNA 208B, N9304F, EXPERIENCED A JAMMED AILERON DURING THE LANDING APPROACH TO KASIGLUK, ALASKA. THE AIRPLANE WAS BEING OPERATED AS A VISUAL FLIGHT RULES (VFR) NON SCHEDULED CARGO FLIGHT UNDER TITLE 14 CFR PART 135 WHEN THE INCIDENT OCCURRED. THE AIRPLANE, OPERATED BY PENINSULA AIRWAYS INC., ANCHORAGE, ALASKA WAS NOT DAMAGED. THE CERTIFICATED AIRLINE TRANSPORT PILOT, THE SOLE OCCUPANT, WAS NOT INJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED. VFR COMPANY FLIGHT FOLLOWING PROCEDURES WERE IN EFFECT. THE FLIGHT ORIGINATED AT THE BETHEL AIRPORT, BETHEL, ALASKA AT 1015. THE PILOT REPORTED HE WAS MANEUVERING TO LAND ON RUNWAY 35 AT KASIGLUK, AND BEGAN A LEFT TURN TO ENTER THE DOWNWIND PORTION OF THE LANDING APPROACH. DURING THE TURN, THE PILOT UTILIZED FULL AILERON DEFLECTION, AND NOTICED THE AILERON MOMENTARILY JAMMED. HE WAS ABLE TO FORCE THE CONTROL WHEEL TO THE RIGHT, UNJAMMING THE AILERON. THE PILOT CONTINUED THE LANDING APPROACH, AND LANDED WITHOUT ENCOUNTERING FURTHER CONTROL PROBLEMS. THE PILOT INDICATED THAT FOLLOWING THE LANDING, HE BEGAN TO TAXI TO THE RAMP. DUE TO A STRONG CROSSWIND, THE PILOT DEFLECTED THE AILERONS FULLY TO THE LEFT. THE AILERON ONCE AGAIN JAMMED, AND THE PILOT WAS UNABLE TO FORCE THE CONTROL WHEEL TO THE RIGHT. THE AIRPLANE AILERONS UTILIZE BALANCE WEIGHTS THAT ARE ATTACHED TO THE INTERIOR SURFACE OF THE LEADING EDGE OF THE AILERON AT THE INBOARD, AND OUTBOARD ENDS OF THE AILERON. FIVE SCREWS ARE INSERTED THROUGH THE LEADING EDGE SKIN OF THE AILERON, THROUGH THE BALANCE WEIGHT, AND INTO SELF-LOCKING NUTS ATTACHED TO A NUT STRIP ASSEMBLY. THE OPERATOR REPORTED THE INCIDENT FLIGHT WAS THE FIRST FLIGHT OF THE DAY FOR THE AIRPLANE. COMPANY MAINTENANCE PERSONNEL CONDUCTED AN INSPECTION OF THE AILERON AND REPORTED 1 SCREW MISSING. THREE OF THE REMAINING 4 SCREWS WERE LOOSE, AND BACKED OUT SUFFICIENT DISTANCE TO CONTACT THE TRAILING EDGE OF THE WING, FORWARD OF THE AILERON. THE LEFT AILERON WAS JAMMED IN A FULL, LEADING EDGE DOWN, POSITION. THE OPERATOR'S MAINTENANCE PERSONNEL REPLACED THE SCREWS, AND DID NOT REPORT ANY OBVIOUS FAILURE OR DAMAGE TO THE ATTACHING SCREWS. THE CESSNA 208B INFORMATION MANUAL PROVIDES A DESCRIPTION OF A PREFLIGHT INSPECTION THAT INCLUDES AN EXAMINATION OF THE AILERONS AS PART OF A WALK-AROUND INSPECTION OF THE AIRPLANE. ## The NTSB's investigation of this event (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB ANC98IA004](https://openairdocs.org/ntsb/ANC98IA004), Oct 20, 1997: Cessna 208B (N9304F), Kasigluk, AK, incident, no damage. Probable cause: inadequate inspection of the aileron by company maintenance personnel, and the pilot's inadequate preflight inspection of the aileron, which led to the jamming of the left aileron due to loose… ## Other reports on N9304F (2) Matched to the same aircraft by N-number and date. - [Incident 19890706038429I](https://openairdocs.org/incident/19890706038429I), Jul 6, 1989: Cessna 208 (N9304F), Clarks Point, AK, Minor damage. Struck a flock of seagulls on initial climb. Continued to destination. Minor damage. - [Incident 19880301024399I](https://openairdocs.org/incident/19880301024399I), Mar 1, 1988: Cessna 208 (N9304F), Kipnuk, AK, Minor damage. Aircraft veered into a snow berm on landing roll. Found right brake locked by ice and left brake leaking fluid. From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.