# AD 73-19-03: Nose Gear Actuating System Failure

- Type: Airworthiness directive
- Status: Current
- Products: Mitsubishi Heavy Industries MU-2B, MU-2B-10, MU-2B-15, MU-2B-20 and MU-2B-25
- Effective: October 8, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1716
- Registered aircraft: 36 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/35831E5494FB313686256A3A006FDA9F.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-19-03

## The airworthiness directive

73-19-03 MITSUBISHI HEAVY INDUSTRIES, LTD: Amdt. 39-1716. Applies to Mitsubishi Model MU-2B airplanes (S/N 004, and 006 through 038); MU-2B-10, and -15 airplanes (S/N 101, and 103 through 120); MU-2B-20, and -25 airplanes (S/N 005, 102, and 121 through 271). Compliance is required as indicated. To prevent the failure of the nose gear actuating system, accomplish the following: Within the next 100 hours' time in service after the effective date of this AD, unless already accomplished, modify the nose gear actuating assembly and its supporting structure in accordance with Mitsubishi MU-2 Service Bulletin No. 155, dated June 26, 1972, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA, Pacific- Asia Region. This amendment becomes effective October 8, 1973.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A2PC](https://openairdocs.org/tcds/A2PC): Mitsubishi Heavy Industries Ltd. 203; names 2 of 7 models: MU-2B, MU-2B-20

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 36 (36 by airframe model, 0 by engine model)
- Makers: Mitsubishi 36

Models with the most aircraft:

- [Mitsubishi MU-2B-25](https://openairdocs.org/model/mitsubishi-mu-2b-25): 23 aircraft (airframe model)
- [Mitsubishi MU-2B-20](https://openairdocs.org/model/mitsubishi-mu-2b-20): 12 aircraft (airframe model)
- [Mitsubishi MU-2B](https://openairdocs.org/model/mitsubishi-mu-2b): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/73-19-03/models.md
Every aircraft: https://openairdocs.org/ad/73-19-03/aircraft.md

Its text cites no advisory circulars or STCs.

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