# Incident 20171003016299I: Beech 99A, Mosinee, WI, October 3, 2017

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: October 3, 2017, 20:10 local time
- Place: Mosinee, WI
- Airport: Central Wisconsin
- Damage: Minor damage
- Phase of flight: Takeoff: Climb Out
- Operating rules: Air taxi and commuter (Part 135)
- Operator: KCQA
- Location: 44.7778° N, 89.6659° W: Placed by OpenAirDocs at CENTRAL WISCONSIN (CWA), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.7778&lon=-89.6659&mi=10
- Aircraft: N599CZ, registered now (https://openairdocs.org/aircraft/N599CZ) (OpenAirDocs)
- Registry model: Beech 99A (registry code 1154003, https://openairdocs.org/model/beech-99a) (OpenAirDocs)
- Registry engine: Pratt & Whitney PT6A series (registry code 52032, https://openairdocs.org/engine/pratt-whitney-pt6a-series) (OpenAirDocs)
- Reported make and model: BEECH 99A
- Reported engine: P&W PT6A SER
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot, flight instructor, private pilot
- Pilot flight hours: 1,372 total, 84 in this make and model, 99 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20171003016299I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON OCTOBER 3, 2017 AT 2010 N599CZ A BE-99 OPERATING UNDER 14 CFR 135 CARGO WAS DEPARTING CENTRAL WISCONSIN AIRPORT (KCWA). DURING THE TAKEOFF ROLL ON RUNWAY 17 THE PILOT HEARD ADDITIONAL WIND NOISE COMING FROM THE CREW HATCH AREA. UPON BEING ASSIGNED A HEADING AFTER DEPARTURE AND CLIMBING THROUGH THE CLOUDS THE PILOT ATTEMPTED TO SECURE THE HATCH. THE PILOT DID NOTE THE ONE OF THE LATCHING HOOKS HAD CAUGHT AND WERE SECURED. DURING THE ATTEMPT THE HATCH OPENED AND EXITED THE AIRCRAFT.

UPON REVIEW OF THE DOOR UNSAFE CHECKLIST IT STATES ?DO NOT ATTEMPT TO CHECK THE SECURITY OF THE CABIN DOOR IN FLIGHT. REMAIN AS FAR FROM THE DOORS AS POSSIBLE WITH SEATBELTS FASTENED.? THE CHECKLIST ADDRESSES THE CABIN DOOR AND NOT THE CREW HATCH. THE OPERATOR?S CHECKLIST DOES REQUIRE THE CREW HATCH TO BE ?SECURED; CONFIRM VISUALLY? ON THE NORMAL CHECKLIST IN THE BEFORE STARTING ENGINES, BEFORE TAXI AND BEFORE TAKEOFF SECTIONS.

THE PILOT DID NOT DECLARE AN EMERGENCY, BUT DID REQUEST A RETURN TO KCWA. THE PILOT LANDED WITHOUT FURTHER INCIDENT. POST INCIDENT INSPECTION MINOR DAMAGE TO THE AIRCRAFT FROM WHERE THE HINGES WERE PULLED FROM THE FUSELAGE.

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.

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