# N58AH: 1956 Sikorsky S-58ET

- Status: Valid registration
- Airframe: [Sikorsky S-58ET](https://openairdocs.org/model/sikorsky-s-58et) (registry code 8141803, 14 seats)
- Engine: [Pratt & Whitney Canada PT6T-6](https://openairdocs.org/engine/pratt-whitney-canada-pt6t-6) (registry code 52106)
- Data sheets: [TCDS 1H11](https://openairdocs.org/tcds/1H11) (Centerpointe Aerospace Inc.), [TCDS E22EA](https://openairdocs.org/tcds/E22EA) (Pratt & Whitney Canada Corp.) (OpenAirDocs)
- Serial number: 58-328
- Year built: 1956
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, normal
- Airworthiness date: June 3, 2003
- Certificate issued: May 1, 2012
- Expires: May 31, 2028
- Mode S code: A77397
- Registered owner: [B&B Helos LLC](https://openairdocs.org/faa-owner/B%26B%20HELOS%20LLC)
- Location: [Perris, CA](https://openairdocs.org/faa-place/CA/Perris)
- Owner type: LLC
- Owner's area on the map: 33.7788° N, 117.3258° W: Placed by OpenAirDocs at the center of ZIP code 92570, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=58AH
- Page: https://openairdocs.org/aircraft/N58AH

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 25 in force

### Matched by airframe (Sikorsky S-58ET)

- [AD 2024-12-10](https://openairdocs.org/ad/2024-12-10): Main Rotor Drive System · Centerpointe Aerospace S-58BT, S-58DT, S-58ET and 3 more. Effective Aug 26, 2024
- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023
- [AD 95-26-08](https://openairdocs.org/ad/95-26-08): Main Rotor Shaft · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Jan 4, 1996
- [AD 95-10-09](https://openairdocs.org/ad/95-10-09): Transmission Main Gear Box Ring Gear · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Jun 16, 1995
- [AD 94-12-07](https://openairdocs.org/ad/94-12-07): Gear Box Assembly · Sikorsky S-58BT, S-58DT, S-58ET and 3 more. Effective Aug 1, 1994
- [AD 89-25-01](https://openairdocs.org/ad/89-25-01): Engine Fire Extinguishing System · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Dec 26, 1989
- [AD 60-17-03 R1](https://openairdocs.org/ad/60-17-03-R1): Main Rotor Blade Assemblies · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Feb 2, 1989
- [AD 64-02-06 R1](https://openairdocs.org/ad/64-02-06-R1): Pylon and Tail Cone Fittings · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Dec 27, 1988
- [AD 86-25-05](https://openairdocs.org/ad/86-25-05): Gearbox Pinions Or Gears · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Jan 5, 1987
- [AD 85-17-08](https://openairdocs.org/ad/85-17-08): Main Rotor Head Bolts · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Jan 13, 1986
- [AD 82-01-07](https://openairdocs.org/ad/82-01-07): Horizontal Hinge Pins · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Feb 1, 1982
- [AD 78-21-05](https://openairdocs.org/ad/78-21-05): Tail Rotor Blades · Sikorsky S-58BT, S-58DT, S-58ET and 3 more. Effective Nov 30, 1978
- [AD 78-05-01](https://openairdocs.org/ad/78-05-01): Fuel Bypass Lines · Sikorsky S-58BT, S-58DT, S-58ET and 3 more. Effective Mar 31, 1978
- [AD 74-15-06](https://openairdocs.org/ad/74-15-06): Tail Rotor Gear Box · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Dec 30, 1977
- [AD 75-13-01](https://openairdocs.org/ad/75-13-01): Main Rotor Assembly · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective May 20, 1977
- [AD 75-07-08](https://openairdocs.org/ad/75-07-08): Tail Assembly · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Apr 8, 1975
- [AD 75-07-07](https://openairdocs.org/ad/75-07-07): Emergency Hatch Handles · Sikorsky S-58B, S-58BT, S-58D and 9 more. Effective Apr 8, 1975
- [AD 59-16-04](https://openairdocs.org/ad/59-16-04): Damper Trunnion Bolt · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Apr 8, 1975
- [AD 66-19-04](https://openairdocs.org/ad/66-19-04): Tail Rotor Blades · Sikorsky S-58A, S-58B, S-58BT and 20 more. Effective Aug 14, 1966
- [AD 61-01-03](https://openairdocs.org/ad/61-01-03): Input Bevel Gear · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Dec 30, 1960
- [AD 60-24-04](https://openairdocs.org/ad/60-24-04): Electrical Cable · Sikorsky S-58A, S-58B, S-58BT and 12 more. Effective Nov 28, 1960
- [AD 57-19-02](https://openairdocs.org/ad/57-19-02): Engine Cooling Fan Assembly · Sikorsky S-58A, S-58B, S-58BT and 12 more

### Matched by engine (Pratt & Whitney Canada PT6T-6)

- [AD 79-11-03](https://openairdocs.org/ad/79-11-03): Automatic Fuel Control · Pratt & Whitney Canada PT6T-3 and PT6T-6. Effective May 31, 1979
- [AD 78-17-05](https://openairdocs.org/ad/78-17-05): Automatic Fuel Control Unit · Pratt & Whitney Canada PT6T-3, PT6T-3A and PT6T-6. Effective Aug 31, 1978
- [AD 76-02-08](https://openairdocs.org/ad/76-02-08): Fuel Pump · Pratt & Whitney Canada PT6T-3, PT6T-3A and PT6T-6. Effective Feb 5, 1976

### Historical (superseded or no longer in force)

- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N58AH.

## FAA accident and incident reports

None matched to N58AH.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (33)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Sikorsky S-58ET)

- [STC SR04549AT](https://openairdocs.org/stc/SR04549AT): Conversion of the Pratt & Whitney PT6T-3 to the PT6T-3B configuration. Centerpointe Aerospace
- [STC SA5783NM](https://openairdocs.org/stc/SA5783NM): Fabrication of Onboard Systems Model 7 CROPHAWK spray flow measuring system. Onboard Systems International
- [STC SH5780NM](https://openairdocs.org/stc/SH5780NM): Fabrication of Onboard Systems model E-46 cargo hook load weigh system. Onboard Systems International
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC
- [STC SR04483CH](https://openairdocs.org/stc/SR04483CH): Installation of NASI NREM18M Air Conditioning Module. National Aircraft Service Inc. (NASI)
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SH464NE](https://openairdocs.org/stc/SH464NE): Installation of an Alternate Float Bottle System. California Helicopter Parts Inc
- [STC SH513NE](https://openairdocs.org/stc/SH513NE): Replacement of auxiliary fuel boost pumps with Parker Hannifin-Airborne inline auxiliary fuel booster pump. California Helicopter Parts Inc
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC
- [STC SR03310CH](https://openairdocs.org/stc/SR03310CH): Installation of NASI Air Conditioning Module. National Aircraft Service Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SR00968CH](https://openairdocs.org/stc/SR00968CH): Reduce take-off gross weight from 13,000 to 12,500 lbs. During passenger and internal cargo carrying operations. (S-58ET s/n 58-855). Midwest Truxton International, Inc
- [STC SR00042SE](https://openairdocs.org/stc/SR00042SE): Modification to allow the use of Configuration II aircraft performance limits. Glacier Helicopter Inc
- [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SH2212NM](https://openairdocs.org/stc/SH2212NM): Installation of Silver Instruments Fueltron IIIPT-IGS, IIIPT-IPS, IIIPT-ILS, IIIPT-IKS digital fuel flow indicating system. Arnav Systems Inc
- [STC SH770NW](https://openairdocs.org/stc/SH770NW): Installation of a weighing system. Onboard Systems
- [STC SH4570NM](https://openairdocs.org/stc/SH4570NM): Approval for takeoffs and landings up to and including 12,000 feet density altitude is authorized. Air One Helicopters, Inc
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SH4539NM](https://openairdocs.org/stc/SH4539NM): Establish a nine passenger seat configuration. Air One Helicopters, Inc
- [STC SH1010GL](https://openairdocs.org/stc/SH1010GL): Reduction of standard passenger seating from sixteen to nine seats or less. Brainerd Helicopters, Inc
- [STC SH4507NM](https://openairdocs.org/stc/SH4507NM): Approval for takeoffs and landings up to and including 12,000 feet densiy altitude is authorized. Los Angeles County Sheriff's Department Aero Bureau
- [STC SA513NE](https://openairdocs.org/stc/SA513NE): Replacement of auxiliary fuel boost pumps with Parker-Hannifin-Airborne in-line auxiliary fuel booster pumps. California Helicopter International
- [STC SH4477NM](https://openairdocs.org/stc/SH4477NM): Installation of FC/FT-10 digital fuel flow indicating system. Arnav Systems, Inc
- [STC SH1215GL](https://openairdocs.org/stc/SH1215GL): Reduction of standard passenger seating from sixteen to nine seats or less. Midwest Truxton International, Inc
- [STC SH142WE](https://openairdocs.org/stc/SH142WE): Installation of electronic weighing system c-40. Onboard Systems
- [STC SH2572NM](https://openairdocs.org/stc/SH2572NM): Increased takeoff and landing density altitude limit. North American Heli Svc Inc
- [STC SH453NW](https://openairdocs.org/stc/SH453NW): Installation of an electronic weighing system (for monitoring cargo weight). Measurement Systems Intl
- [STC SH1194EA](https://openairdocs.org/stc/SH1194EA): Conversion from original 12 passenger configuration to a 9 passenger configuration. Carson Helicopters Inc
- [STC SH268WE](https://openairdocs.org/stc/SH268WE): Installation of stainless steel fire shields around aluminum engine mount fittings (P/N S1620-61435) of HSS, HUS, H-34 military series helicopters. (S-58 SERIES Military versions HSS, HUS, H-34). TBM, Inc. Lists S-58 Series
- [STC SA77GL](https://openairdocs.org/stc/SA77GL): Installation of Bendix weather radar RDR-1200. Chicago Heli Airways Inc
- [STC SH3NE](https://openairdocs.org/stc/SH3NE): Norton AC3093K radome installation and Bendix RDR 110 radar system installation. Oxford Avionics, Inc

### Approved for the engine (Pratt & Whitney Canada PT6T-6)

- [STC SE00022EN](https://openairdocs.org/stc/SE00022EN): Installation of Oil Tank Filler Neck Check Valve. Helicopter Support Inc Services Div
- [STC SE659NE](https://openairdocs.org/stc/SE659NE): Installation of oil tank filler neck check valve, P/N TSA-76A. Aviation Components Support

## Related

- Other Sikorsky S-58ET aircraft: https://openairdocs.org/model/sikorsky-s-58et/aircraft.md
- The Pratt & Whitney Canada PT6T-6 engine: https://openairdocs.org/engine/pratt-whitney-canada-pt6t-6.md

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