# N401AJ: 1993 Billings Flying Service CH-47D

- Status: Valid registration
- Airframe: [Billings Flying Service CH-47D](https://openairdocs.org/model/billings-flying-service-ch-47d) (registry code 138160B, 3 seats)
- Engine: [Honeywell T55-GA-714A](https://openairdocs.org/engine/honeywell-t55-ga-714a) (registry code 33886)
- Data sheets: [TCDS R0011DE](https://openairdocs.org/tcds/R0011DE) (Billings Flying Service Inc.) (OpenAirDocs)
- Serial number: 93-0930
- Year built: 1993
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Restricted, agriculture and pest control, forest, other
- Airworthiness date: January 13, 2016
- Certificate issued: June 3, 2016
- Expires: June 30, 2029
- Mode S code: A4B061
- Registered owner: [Billings Flying Service LLC](https://openairdocs.org/faa-owner/BILLINGS%20FLYING%20SERVICE%20LLC)
- Location: [Billings, MT](https://openairdocs.org/faa-place/MT/Billings)
- Owner type: Corporation
- Owner's area on the map: 45.8137° N, 108.7098° W: Placed by OpenAirDocs at the center of ZIP code 59106, 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=401AJ
- Page: https://openairdocs.org/aircraft/N401AJ

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): 3 in force

### Matched by airframe (Billings Flying Service CH-47D)

- [AD 2024-20-05](https://openairdocs.org/ad/2024-20-05): Flight control systems · Columbia Helicopters 234 and CH-47D. Effective Oct 28, 2024
- [AD 2021-23-06](https://openairdocs.org/ad/2021-23-06): Rotor flight controls · Columbia Helicopters 234 and CH-47D. Effective Jan 4, 2022
- [AD 2018-16-11](https://openairdocs.org/ad/2018-16-11): Main Rotor Head · Billings Flying Service CH-47D, 234, CH-47D and 1 more. Effective Sep 17, 2018

### Matched by engine (Honeywell T55-GA-714A)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N401AJ.

## FAA accident and incident reports

None matched to N401AJ.

## Reports on N401AJ not matched to an aircraft (1)

They name N401AJ, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19980228008119I](https://openairdocs.org/incident/19980228008119I), Feb 28, 1998: Lear 25B (N401AJ), Ames, IA. Narrative: N401AJ departed pwa enroute to amw. Captain received NOTAM that amw had loose snow on runways. Captain called FBO at amw and received same report…

## 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) (5)

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 (Billings Flying Service CH-47D)

- [STC SR02510SE](https://openairdocs.org/stc/SR02510SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc
- [STC SR02599SE](https://openairdocs.org/stc/SR02599SE): Installation of a Kawak Aviation Technologies Model 41300 auxiliary hydraulic system. Kawak Aviation Technologies, Inc
- [STC SR01136DE](https://openairdocs.org/stc/SR01136DE): Installation of Night Vision Imaging System (NVIS) / Night Vision Goggles (NVG) Compatible Lighting System. Billings Flying Service
- [STC SR00788DE](https://openairdocs.org/stc/SR00788DE): Installation of Bubble Windows on BFS CH-47D Chinook Rotorcraft for Left and Right sides of the Pilot and Co-Pilot doors respectively. Billings Flying Service Inc
- [STC SR02598SE](https://openairdocs.org/stc/SR02598SE): Installation of a Kawak Aviation Technologies Model 41400 aerial liquid dispensing system. Kawak Aviation Technologies Inc

## Related

- Other Billings Flying Service CH-47D aircraft: https://openairdocs.org/model/billings-flying-service-ch-47d/aircraft.md
- The Honeywell T55-GA-714A engine: https://openairdocs.org/engine/honeywell-t55-ga-714a.md

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