# N422AU: 1949 Boeing 377MG

- Status: Valid registration
- Airframe: [Boeing 377MG](https://openairdocs.org/model/boeing-377mg) (registry code 1382712, 92 seats)
- Engine: [Pratt & Whitney R-2800 series](https://openairdocs.org/engine/pratt-whitney-r-2800-series) (registry code 52026)
- Data sheets: [TCDS A-812](https://openairdocs.org/tcds/A-812) (Aero Spacelines Incorporated) (OpenAirDocs)
- Serial number: 15937
- Year built: 1949
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, transport
- Airworthiness date: November 25, 1969
- Certificate issued: January 18, 2017
- Expires: January 31, 2030
- Mode S code: A50320
- Registered owner: [Port Of Tillamook Bay](https://openairdocs.org/faa-owner/PORT%20OF%20TILLAMOOK%20BAY)
- Location: [Tillamook, OR](https://openairdocs.org/faa-place/OR/Tillamook)
- Owner type: Government
- Owner's area on the map: 45.5075° N, 123.7371° W: Placed by OpenAirDocs at the center of ZIP code 97141, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=422AU
- Page: https://openairdocs.org/aircraft/N422AU

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. The registry lists only the engine series, so ADs for every Pratt & Whitney R-2800 model are included.

## ADs that may apply (OpenAirDocs): 9 in force

### Matched by airframe (Boeing 377MG)

- [AD 56-01-02](https://openairdocs.org/ad/56-01-02): Wing Spar Splice Bolt Holes · Aero Spacelines 377, 377MG and 377SGT
- [AD 55-09-01](https://openairdocs.org/ad/55-09-01): Magnetic Circuit Breaker · Aero Spacelines 377, 377MG and 377SGT
- [AD 53-05-01](https://openairdocs.org/ad/53-05-01): Propellers Slip Rings · Aero Spacelines 377, 377MG, 377SGT and 6 more
- [AD 52-15-01](https://openairdocs.org/ad/52-15-01): Reversing Solenoid Circuits · Aero Spacelines 377, 377MG and 377SGT
- [AD 52-12-01](https://openairdocs.org/ad/52-12-01): Compressor Motors · Aero Spacelines 377, 377MG and 377SGT
- [AD 51-27-02](https://openairdocs.org/ad/51-27-02): Wheel Assemblies · Aero Spacelines 377, 377MG and 377SGT
- [AD 49-06-04](https://openairdocs.org/ad/49-06-04): Altitude Compensating Bellows · Aero Spacelines 377, 377MG and 377SGT
- [AD 55-15-01](https://openairdocs.org/ad/55-15-01): Propeller Feathering Lines · Aero Spacelines 377, 377MG and 377SGT
- [AD 50-40-01](https://openairdocs.org/ad/50-40-01): Nose Gear Spindle · Aero Spacelines 377, 377MG and 377SGT

### Matched by engine (Pratt & Whitney R-2800 series)

None in force.

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

- [AD 74-08-09 R2](https://openairdocs.org/ad/74-08-09-R2) (historical): Waste Receptacles · Aero Spacelines 377, 377MG, 377SGT and 268 more. Effective Jul 29, 1996

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N422AU.

## FAA accident and incident reports (2)

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.

- [Incident 19911027051519I](https://openairdocs.org/incident/19911027051519I), Oct 27, 1991: Aerspc 377MG (N422AU), Smyrna, TN, Minor damage. NR1 engine fire warning en route. Shut down and fired bottles. Landed at Smyrna with incident.
- [Incident 19900406020379I](https://openairdocs.org/incident/19900406020379I), Apr 6, 1990: Aerspc 377MG (N422AU), Portland, OR. Engine overheated with cowl flaps closed while holding for departure. Fuel in fuel drain caught fire.

## 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) (1)

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 (Boeing 377MG)

- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc

## Related

- Other Boeing 377MG aircraft: https://openairdocs.org/model/boeing-377mg/aircraft.md
- The Pratt & Whitney R-2800 series engine: https://openairdocs.org/engine/pratt-whitney-r-2800-series.md

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