# N504: 1957 Sikorsky S58E

- Status: Valid registration
- Airframe: [Sikorsky S58E](https://openairdocs.org/model/sikorsky-s58e) (registry code 8141811, 14 seats)
- Engine: [Wright R-1820 series](https://openairdocs.org/engine/wright-r-1820-series) (registry code 67020)
- Data sheets: [TCDS 1H11](https://openairdocs.org/tcds/1H11) (Centerpointe Aerospace Inc.) (OpenAirDocs)
- Serial number: 57-1717
- Year built: 1957
- Type: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: August 10, 1982
- Certificate issued: June 10, 2015
- Expires: June 30, 2028
- Mode S code: A648CB
- Registered owner: [Vi 1 LLC](https://openairdocs.org/faa-owner/VI%201%20LLC)
- Location: [Brewster, WA](https://openairdocs.org/faa-place/WA/Brewster)
- Owner type: LLC
- Owner's area on the map: 48.1315° N, 119.8060° W: Placed by OpenAirDocs at the center of ZIP code 98812, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=504
- Page: https://openairdocs.org/aircraft/N504

From the FAA registry file of October 22, 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. The registry lists only the engine series, so ADs for every Wright R-1820 model are included.

## ADs that may apply (OpenAirDocs): 18 in force

### Matched by airframe (Sikorsky S58E)

- [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 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 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 (Wright R-1820 series)

None in force.

### 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 N504.

## FAA accident and incident reports

None matched to N504.

## Reports on N504 not matched to an aircraft (3)

They name N504, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19810602056169I](https://openairdocs.org/incident/19810602056169I), Jun 2, 1981: Fokker F28MK4000 (N504), Raleigh, NC, Minor damage. Za turbulence at 27000. 3 minor injuries landed rdu repaired minor damage.
- [Incident 19810429028719I](https://openairdocs.org/incident/19810429028719I), Apr 29, 1981: Fokker F28MK4000 (N504), Yardley, PA. Turbulence inflight. Two flight attendants fell and hurt thier backs.
- [Incident 19800212021129I](https://openairdocs.org/incident/19800212021129I), Feb 12, 1980: Doug DC9 (N504), Denver, CO. Flight attendant became ill.

## Service difficulty reports (1)

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

- [SDR XC42001F00000](https://openairdocs.org/sdr/XC42001F00000), Dec 10, 2001: STATOR. DEFECTIVE. BRAKE ASSEMBLY (PN 2-1661) FAILED PREMATURELY. NR 1 STATOR CRACKED THROUGH IN 2 PLACES CAUSING SIGNIFICANT DAMAGE TO TORQUE TUBE AND WHEEL ASSEMBLY. PIECE OF ST

## Service difficulty reports on N504 not matched to an aircraft (3)

They name N504, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR WVER2016042300002](https://openairdocs.org/sdr/WVER2016042300002), Apr 23, 2016: FRAME. OUT OF ALIGNMENT. WHILE PERFORMING SB 670BA-53-045, REV D FOUND 4 EACH EXISTING FASTENER HOLES TO BE PITCHED INTO RADIUS OF LT FS 220.0 FRAME SECTOR.
- [SDR WVER2016042150401](https://openairdocs.org/sdr/WVER2016042150401), Apr 21, 2016: FRAME. CRACKED. LEFT BS 235 FRAME HAS A CRACK INDICATION .4 INCH LONG IN THE RADIUS AT STRINGER 13A.
- [SDR MASA2012112252298](https://openairdocs.org/sdr/MASA2012112252298), Nov 22, 2012: LIGHT. INOPERATIVE. CEILING LEVEL FLOODLIGHT EMERGENCY LIGHT INOP. MAINTENANCE REPLACED THE LAMP.

## STCs that may be installed (OpenAirDocs) (17)

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 S58E)

- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [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 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 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 SH8030SW](https://openairdocs.org/stc/SH8030SW): Installation of an engine fire detection system. California Helicopter Intn'l, Inc
- [STC SH770NW](https://openairdocs.org/stc/SH770NW): Installation of a weighing system. Onboard Systems
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SH142WE](https://openairdocs.org/stc/SH142WE): Installation of electronic weighing system c-40. Onboard Systems
- [STC SH453NW](https://openairdocs.org/stc/SH453NW): Installation of an electronic weighing system (for monitoring cargo weight). Measurement Systems Intl
- [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 SH109GL](https://openairdocs.org/stc/SH109GL): Installation of CH-34A titanium firewall with intumescent coating. Lake Line Helicopters Inc

## Earlier aircraft with N504

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N504 before.

- [Cancelled 1970-06-19](https://openairdocs.org/deregistered/N504-1970-06-19): Sud SE3130 ALOUETTE II, S/N 1085. Owner: [Sanders Aviation Company](https://openairdocs.org/faa-owner/SANDERS%20AVIATION%20COMPANY), [Annapolis, MD](https://openairdocs.org/faa-place/MD/Annapolis)
- [Cancelled 1948-03-31](https://openairdocs.org/deregistered/N504-1948-03-31): Cessna T-50, S/N 4449. Owner: [Dartmouth Airways Inc](https://openairdocs.org/faa-owner/DARTMOUTH%20AIRWAYS%20INC), [Hanover, NH](https://openairdocs.org/faa-place/NH/Hanover)
- [Cancelled 1930-03-14](https://openairdocs.org/deregistered/N504-1930-03-14): Robinson /Christensen /Wright FIREFLY, S/N CRW-1. Owner: [Messrs J Robinson](https://openairdocs.org/faa-owner/MESSRS%20J%20ROBINSON), [Los Angeles, CA](https://openairdocs.org/faa-place/CA/Los%20Angeles)

## Related

- Other Sikorsky S58E aircraft: https://openairdocs.org/model/sikorsky-s58e/aircraft.md
- The Wright R-1820 series engine: https://openairdocs.org/engine/wright-r-1820-series.md

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