# NTSB ANC92IA100: Fairchild SA227-AC, N620PA, Dillingham, AK, June 26, 1992 - Type: NTSB incident investigation - Classification: Incident · No injuries · Incident investigation · Final report - Date: June 26, 1992, 13:00 local (21:00 UTC) - Place: Dillingham, AK - Coordinates: 58.819419, -157.860946 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=58.8194&lon=-157.8609&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 13 uninjured - Status: Completed, report September 28, 1993 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 5659 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC92IA100 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5659/pdf - Page: https://openairdocs.org/ntsb/ANC92IA100 ## Probable cause (aircraft 2) THE PILOT IN COMMAND'S FAILURE TO MAINTAIN A VISUAL LOOKOUT. FACTORS WERE THE DRIZZLE AND FOG AND THE IMPOSSIBILITY OF UPDATING THE RECORDED WEATHER INFORMATION BY ATC PERSONNEL. ## Probable cause (aircraft 1) THE VISUAL LOOKOUT THAT WAS NOT MAINTAINED BY THE PILOT OF THE OTHER AIRPLANE. FACTORS WERE THE DRIZZLE AND FOG AND THE IMPOSSIBILITY OF UPDATING THE RECORDED WEATHER INFORMATION BY ATC PERSONNEL. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Near collision between aircraft, approach - faf/outer marker to threshold (ifr) - weather condition - drizzle/mist (contributing factor) - weather condition - fog (contributing factor) - visual lookout - not maintained, pilot of other aircraft (cause) - updating of recorded weather information - not possible, atc personnel(fss) (contributing factor) - Near collision between aircraft, maneuvering - weather condition - drizzle/mist (contributing factor) - weather condition - fog (contributing factor) - visual lookout - not maintained, pilot in command (cause) - updating of recorded weather information - not possible, atc personnel(fss) (contributing factor) ## Analysis (aircraft 2) PENAIR FLIGHT 4266 WAS CLEARED FOR A LOCALIZER DME APPROACH TO RUNWAY 19. THE AIRPLANE BROKE OUT OF THE CLOUDS AT 800 FEET MSL AT 4.8 DME FROM THE AIRPORT. THE CREW IMMEDIATELY SAW AN AIRPLANE DIRECTLY IN FRONT, AND AFTER EVASIVE ACTION THE AIRPLANES PASSED WITHIN 100 FEET OF EACH OTHER. THE SPECIAL WEATHER OBSERVATION, TAKEN ONE MINUTE PRIOR TO THE NEAR MID AIR BUT NOT YET TRANSMITTED, SHOWED THE CONTROL ZONE BELOW VISUAL METEOROLOGICAL CONDITIONS. HOWEVER, THE PREVIOUS HOURLY OBSERVATION, AND THE MOST CURRENT TRANSMITTED OBSERVATION, SHOWED THAT THE CONTROL ZONE WAS UNDER VISUAL METEOROLOGICAL CONDITIONS. ## Analysis (aircraft 1) PENAIR FLIGHT 4266 WAS CLEARED FOR A LOCALIZER DME APPROACH TO RUNWAY 19. THE AIRPLANE BROKE OUT OF THE CLOUDS AT 800 FEET MSL AT 4.8 DME FROM THE AIRPORT. THE CREW IMMEDIATELY SAW AN AIRPLANE DIRECTLY IN FRONT, AND AFTER EVASIVE ACTION THE AIRPLANES PASSED WITHIN 100 FEET OF EACH OTHER. THE SPECIAL WEATHER OBSERVATION, TAKEN ONE MINUTE PRIOR TO THE NEAR MID AIR BUT NOT YET TRANSMITTED, SHOWED THE CONTROL ZONE BELOW VISUAL METEOROLOGICAL CONDITIONS. HOWEVER, THE PREVIOUS HOURLY OBSERVATION, AND THE MOST CURRENT TRANSMITTED OBSERVATION, SHOWED THAT THE CONTROL ZONE WAS UNDER VISUAL METEOROLOGICAL CONDITIONS. ## Aircraft 1 - Registration: [N620PA](https://openairdocs.org/deregistered/N620PA-2008-10-10), registration cancelled 2008-10-10, S/N AC-533, built 1982 (OpenAirDocs) - Reported make and model: FAIRCHILD SA227-AC - Registry model: [Fairchild SA227-AC](https://openairdocs.org/model/fairchild-sa227-ac) (registry code 3377509) (OpenAirDocs) - Registry engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: AC 533 - Engines: GARRETT TPE-331-10 1000 horsepower turbo prop - Damage: No damage - Flight: Part 135 - Operator: Peninsula Airways, Inc., doing business as Penair - Registered owner: Peninsula Airways, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: Unknown, January 2, 1900 - Departed: ANC, ANCHORAGE, AK - Flight plan: IFR - Airport: DLG, Dillingham, runway 19, 6,404 × 150 ft, macadam ## Aircraft 2 - Registration: N75941 (not matched to a registry record) - Reported make and model: CESSNA 207A - Category: Airplane - Serial number: 20700656 - Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating - Damage: No damage - Flight: Part 135 - Operator: Markair Express - Registered owner: Markair Inc. - Airworthiness certificate: Standard, Normal - Last inspection: Unknown, January 2, 1900 - Destination: DLG - Flight plan: Company VFR - Airport: DLG, Dillingham, runway 19, 6,404 × 150 ft, macadam ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N620PA; age 42; airline transport, commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 14,000 total, 200 in the last 90 days - Pilot, aircraft N75941; age 25; commercial, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 2,500 total ## Weather - Conditions: Instrument (IMC), Day - Wind: 120° at 7 knots - Visibility: 2 statute miles - Lowest ceiling: 800 ft overcast - Altimeter: 29.00 inHg - Observed at: DLG, 4 nm away ## FAA reports on this event (2) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 19920626057001I](https://openairdocs.org/incident/19920626057001I), Jun 26, 1992: Swrngn SA227AC, Dillingham, AK. Near midair collisiion during local approach to airport. Banked left to avoid N75941 in traffic pattern. - [Incident 19920626057002I](https://openairdocs.org/incident/19920626057002I), Jun 26, 1992: Cessna 207, Dillingham, AK. Weather went to IFR while in traffic pattern. Other aircraft on local approach. Did not see N620PA on approach. ## Other investigations on N620PA (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 CHI06LA244](https://openairdocs.org/ntsb/CHI06LA244), Aug 17, 2006: Fairchild SA227-AC (N620PA), Grain Valley, MO, substantial damage. Probable cause: the pilot not maintaining clearance from the fence. Contributing factors were the pilot's fatigue and the fence. 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.