# NTSB ANC93LA014: Cessna 207, N9237M, Ekwok, AK, November 11, 1992 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: November 11, 1992, 13:55 local (17:55 UTC) - Place: Ekwok, AK - Coordinates: 59.350814, -157.480148 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=59.3508&lon=-157.4801&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 2 serious, 2 minor, 1 uninjured - Status: Completed, report August 30, 1993 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 5850 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC93LA014 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5850/pdf - Page: https://openairdocs.org/ntsb/ANC93LA014 ## Probable cause THE PILOT FAILED TO MAINTAIN AIRSPEED AND INADVERTENTLY STALLED THE AIRPLANE. CONTRIBUTING TO THE ACCIDENT WERE THE PILOTS IMPROPER IN FLIGHT PLANNING/DECISION, HER INTENTIONAL FLIGHT INTO KNOWN ADVERSE WEATHER, AND THE FOG AND ICING CONDITIONS. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, maneuvering - weather condition - fog (contributing factor) - in-flight planning/decision - improper, pilot in command (contributing factor) - weather condition - icing conditions (contributing factor) - flight into known adverse weather - intentional, pilot in command (contributing factor) - stall - inadvertent, pilot in command (cause) - airspeed - not maintained, pilot in command (cause) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis THE AIR TAXI PILOT LOST CONTROL OF THE AIRPLANE AND CRASHED DURING THE SECOND ABORTED VFR APPROACH. WHILE THE PILOT SAID VFR CONDITIONS EXISTED, HER PASSENGERS, AND WITNESSES ON THE GROUND SAID THE VISIBILITY WAS LESS THAN ONE MILE. THE PASSENGERS SAID THE AIRPLANES WINDSHIELD AND WINGS WERE ACCUMULATING ICE BEFORE AND DURING THE APPROACHES. THE PILOT COULD SEE OUTSIDE ONLY BY LOOKING OUT THE SIDE WINDOWS. ONE PASSENGER SAID THAT DURING THE SECOND APPROACH, HE TAPPED THE PILOT ON HER SHOULDER AND TOLD HER THAT THE RUNWAY WAS ON THE RIGHT SIDE OF THE AIRPLANE, AND POINTED TO IT. HE FURTHER SAID THAT THE PILOT THEN DID A VERY STEEP RIGHT TURN TOWARD THE RUNWAY, DURING WHICH THE AIRPLANE SHUDDERED VIOLENTLY, STALLED AND FELL TO THE GROUND. THE PILOT SAID THE ENGINE WOULD ONLY DELIVER PARTIAL POWER DURING THE SECOND ABORTED APPROACH. PASSENGERS AND PERSONS ON THE GROUND SAID THE ENGINE SOUNDED LIKE IT WAS DEVELOPING FULL POWER. DURING POST ACCIDENT DISASSEMBLY OF THE ENGINE, NO PROBLEMS WERE FOUND THAT WERE CONSIDERED CAUSAL TO A PARTIAL POWER LOSS. ## Aircraft - Registration: [N9237M](https://openairdocs.org/deregistered/N9237M-1997-11-22), registration cancelled 1997-11-22, S/N 20700678, built 1980 (OpenAirDocs) - Reported make and model: CESSNA 207 - Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073605) (OpenAirDocs) - Registry engine: [Continental IO-520-F](https://openairdocs.org/engine/continental-io-520-f) (registry code 17237, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 20700678 - Airframe hours: 11011 - Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: Stan Wren, doing business as Wren Air, Inc. - Registered owner: Stan Wren - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, October 19, 1992, 50 hours before - Departed: DLG, DILLINGHAM, AK - Flight plan: Company VFR - Airport: KEK, Ekwok, runway 2, 2,700 × 100 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; commercial; airplane ratings: multi-engine land, single-engine land, single-engine sea; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 2,800 total, 2,200 in this make and model, 2,700 as pilot in command, 280 in the last 90 days, 90 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 3 statute miles - Lowest ceiling: 600 ft overcast - Temperature: 30 °F ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19921111046369A](https://openairdocs.org/incident/19921111046369A), Nov 11, 1992: Cessna 207, Ekwok, AK, Substantial damage. In and out of clouds and fog missed approach. On second try banked steeply to make runway. Stalled. Ice on aircraft ## Other investigations on N9237M (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 ANC85LA032](https://openairdocs.org/ntsb/ANC85LA032), Jan 4, 1985: Cessna 207A (N9237M), Nuiqsut, AK, substantial damage 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. --- 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.