# N406KT: 1995 Boeing CH-47D

- Status: Valid registration
- Airframe: [Boeing CH-47D](https://openairdocs.org/model/boeing-ch-47d) (registry code 138160A, 44 seats)
- Engine: [Honeywell 55-L-714A](https://openairdocs.org/engine/honeywell-55-l-714a) (registry code 33889)
- Data sheets: [TCDS R00051SE](https://openairdocs.org/tcds/R00051SE) (Columbia Helicopters Inc.) (OpenAirDocs)
- Serial number: M3662
- Year built: 1995
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Restricted, agriculture and pest control, forest, other
- Airworthiness date: March 13, 2025
- Certificate issued: June 30, 2023
- Expires: June 30, 2030
- Mode S code: A4C3DE
- 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=406KT
- Page: https://openairdocs.org/aircraft/N406KT

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): 4 in force

### Matched by airframe (Boeing 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 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 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 55-L-714A)

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### Historical (superseded or no longer in force)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 N406KT.

## FAA accident and incident reports

None matched to N406KT.

## 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 (Boeing CH-47D)

- [STC SR02510SE](https://openairdocs.org/stc/SR02510SE): Installation of a Supplemental Lighting System. Aviation Specialties Unlimited Inc
- [STC SR04590CH](https://openairdocs.org/stc/SR04590CH): Installation of a Helitak FT11K Liquid Dispensing System. Helitak USA, LLC
- [STC SR02599SE](https://openairdocs.org/stc/SR02599SE): Installation of a Kawak Aviation Technologies Model 41300 auxiliary hydraulic system. Kawak Aviation Technologies, Inc
- [STC SR12015SE](https://openairdocs.org/stc/SR12015SE): Installation of Green Power Monitoring Systems International, Inc. (GPMS) Foresight MX Flight Data Monitoring System (FDMS). GPMS International Inc
- [STC SR02466SE](https://openairdocs.org/stc/SR02466SE): Installation of the Simplex Model 347 aerial dispensing of liquids system. Simplex Manufacturing Company

## Related

- Other Boeing CH-47D aircraft: https://openairdocs.org/model/boeing-ch-47d/aircraft.md
- The Honeywell 55-L-714A engine: https://openairdocs.org/engine/honeywell-55-l-714a.md

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