19950213001699A

Accident · Substantial damage

FAA accident report · Skrsky S-58JT · Marblemount, WA · February 13, 1995

Date: February 13, 1995 · 10:20 local
Place: Marblemount, WA
Phase of flight: Pwr On Vertical Ldng/Rtrcrft
Operating rules: Rotorcraft external load (Part 133)
Operator: GKIL
Damage: Substantial damage
Aircraft: N1099T
NTSB investigation: NTSBSEA95LA051
Reported as: Skrsky S58JT
Reported engine: Pratt & Whitney PT6T3
Fatal injuries: 0
Pilot’s flight hours: 11,389 total3,139 in this make and model95 in the last 90 days

N1099TRegistration cancelled Sep 25, 2013 · Sikorsky S-58JTS/N 581646 · Built 1963 Airframe modelSikorsky S-58JT Engine modelPratt & Whitney Canada PT6A-60ATurbo-prop

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.

Loud bang. Dropped load. Impacted terrain. Main rotor shaft separated. Shaft had 952 hrs. Normal overhaul 2500 hrs.

As the FAA filed it

LOUD BANG. DROPPED LOAD. IMPACTED TERRAIN. MAIN ROTOR SHAFT SEPARATED. SHAFT HAD 952 HRS. NORMAL OVERHAUL 2500 HRS.

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 SEA95LA051Accident · Serious injuriesLimited investigationFinal reportMarblemount, WAFatigue failure of the main rotor driveshaft.Feb 13, 1995 · Substantial damage