# N1099T: 1963 Sikorsky S-58JT, registration cancelled 2013-09-25

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: September 25, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Sikorsky S-58JT](https://openairdocs.org/model/sikorsky-s-58jt) (registry code 8141807)
- Engine: [Pratt & Whitney Canada PT6A-60A](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-60a) (registry code 52043)
- Data sheets: [TCDS 1H11](https://openairdocs.org/tcds/1H11), [TCDS E4EA](https://openairdocs.org/tcds/E4EA) (OpenAirDocs)
- Serial number: 581646
- Year built: 1963
- Type of aircraft: Rotorcraft
- Engine type: Turbo-prop
- Airworthiness: Standard, transport
- Airworthiness date: July 17, 1991
- Certificate issued: June 12, 1991
- Last registry action: August 31, 2001
- Mode S code: A029C8
- Owner when cancelled: [Glacier Helicopter Inc](https://openairdocs.org/faa-owner/GLACIER%20HELICOPTER%20INC)
- Location: [Bellingham, WA](https://openairdocs.org/faa-place/WA/Bellingham)
- Owner type: Corporation
- Owner's area on the map: 48.7582° N, 122.5065° W: Placed by OpenAirDocs at the center of ZIP code 98225, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N1099T
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=1099T
- Page: https://openairdocs.org/deregistered/N1099T-2013-09-25

From the FAA registry file of November 4, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Sikorsky S-58JT: https://openairdocs.org/model/sikorsky-s-58jt.md

## Service difficulty reports (1)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 95ZZZX1352](https://openairdocs.org/sdr/95ZZZX1352), Mar 7, 1995: SHAFT. CRACKED. TRANSMISSION DISASSEMBLED FOR OVERHAUL. PERFORMED MAGNAFLUX INSPECTION OF MAST FOLLOWING STRUCTURAL FAILURE IN ANOTHER AIRCRAFT; .3750 INCH CRACK INDICATION FOU

## NTSB investigations (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 SEA95LA051](https://openairdocs.org/ntsb/SEA95LA051), Feb 13, 1995: Sikorsky S-58JT (N1099T), Marblemount, WA, substantial damage. Probable cause: FATIGUE FAILURE OF THE MAIN ROTOR DRIVESHAFT.

## FAA accident and incident reports (1)

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.

- [Accident 19950213001699A](https://openairdocs.org/incident/19950213001699A), Feb 13, 1995: Skrsky S58JT (N1099T), Marblemount, WA, Substantial damage. Loud bang. Dropped load. Impacted terrain. Main rotor shaft separated. Shaft had 952 hrs. Normal overhaul 2500 hrs.

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