# N4QB: 1971 Hawker Siddeley HS125 SERIES 400A, registration cancelled 2017-07-18

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 18, 2017
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Hawker Siddeley HS125 SERIES 400A](https://openairdocs.org/model/hawker-siddeley-hs125-series-400a) (registry code 4230145)
- Engine: [AiResearch TFE731 series](https://openairdocs.org/engine/airesearch-tfe731-series) (registry code 01518)
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU) (OpenAirDocs)
- Serial number: 25255
- Year built: 1971
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-jet
- Airworthiness: Standard, transport
- Airworthiness date: December 21, 1994
- Certificate issued: October 4, 1999
- Last registry action: October 21, 2008
- Mode S code: A4A94F
- Owner when cancelled: [River Run Projects LLC](https://openairdocs.org/faa-owner/RIVER%20RUN%20PROJECTS%20LLC)
- Location: [Pelham, NH](https://openairdocs.org/faa-place/NH/Pelham)
- Owner type: Corporation
- Owner's area on the map: 42.7310° N, 71.3371° W: Placed by OpenAirDocs at the center of ZIP code 03076, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N4QB
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4QB
- Page: https://openairdocs.org/deregistered/N4QB-2017-07-18

From the FAA registry file of October 28, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Hawker Siddeley HS125 SERIES 400A: https://openairdocs.org/model/hawker-siddeley-hs125-series-400a.md

## Service difficulty reports (2)

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

- [SDR 2006FA0000872](https://openairdocs.org/sdr/2006FA0000872), Aug 4, 2006: PUMP. FAILED. NR 1 HYDRAULIC SYS FAILURE RESULTING IN LOSS OF HYDRAULIC FLUID. IN FLIGHT DIVERT AFTER DEPARTURE, AFTER ALTERNATE LANDING GEAR/ FLAP EXTNESION. LT HYDRAULIC SY
- [SDR 96ZZZX3899](https://openairdocs.org/sdr/96ZZZX3899), Jul 19, 1996: DUCT. CRACKED. WHILE ACCOMPLISHING AIRFRAME INSPECTION, ONE OF THE INSPECTION REQUIREMENTS CALLED OUT TO INSPECT THE APU. WHILE CONDUCTING THE INSPECTION, NOTED A LARGE CRACK 

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