20240610008519A

Accident · Substantial damage

FAA accident report · Dehavilland BEAVER L-20A · Port Alsworth, AK · June 10, 2024

Date: June 10, 2024 · 16:30 local
Place: Port Alsworth, AK
Airport: Kijik Lake
Phase of flight: Cruise/Level Flight
Operating rules: General operating rules (Part 91)
Operator: ITDC
Damage: Substantial damage
Aircraft: N4957
NTSB investigation: NTSBANC24LA049
Reported as: Dehavilland Beaver L-20A
Reported engine: Pratt & Whitney R-985 series
People aboard: 6
Fatal injuries: 0
Other injuries: 1
Pilot’s certificate: Commercial pilot
Pilot’s flight hours: 594 total51 in this make and model

N4957Registered now · Dehavilland BEAVER L-20AS/N 490 · Built 1953 Airframe modelDehavilland BEAVER L-20A Engine modelPratt & Whitney R-985 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

Loaded up the passangers at Kijik Lake. Gave safety briefing. Warmed up engine to 40 degrees. Engine oil was at correct temp. Ran carb heat to approprite temps. Turned carb heat off, cycled prop 4 times looking at rpm’s, mp and oil pressure. After the prop cycle checked mags to ensure they were within tolerence. After the run up went to the farthest edge of the lake and took off. Shortly after take off adjusted mp, rpms and flaps for climb. Around 3 miles after take off felt mp fall at which time went full prop and full power. The engine had a small spool up then mp fell and executed an emergency landing.

As the FAA filed it

LOADED UP THE PASSANGERS AT KIJIK LAKE. GAVE SAFETY BRIEFING.WARMED UP ENGINE TO 40 DEGREES.ENGINE OIL WAS AT CORRECT TEMP. RAN CARB HEAT TO APPROPRITE TEMPS. TURNED CARB HEAT OFF, CYCLED PROP 4 TIMES LOOKING AT RPM’S, MP AND OIL PRESSURE. AFTER THE PROP CYCLE CHECKED MAGS TO ENSURE THEY WERE WITHIN TOLERENCE. AFTER THE RUN UP WENT TO THE FARTHEST EDGE OF THE LAKE AND TOOK OFF. SHORTLY AFTER TAKE OFF ADJUSTED MP, RPMS AND FLAPS FOR CLIMB. AROUND 3 MILES AFTER TAKE OFF FELT MP FALL AT WHICH TIME WENT FULL PROP AND FULL POWER. THE ENGINE HAD A SMALL SPOOL UP THEN MP FELL AND EXECUTED AN EMERGENCY LANDING.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB ANC24LA049Accident · Serious injuriesClass 3 · LimitedFinal reportPort Alsworth, AKA partial loss of engine power for reasons that could not be determined.Jun 11, 2024 · Substantial damage