# AD 72-01-02: Oil Drain Tubes

- Type: Airworthiness directive
- Status: Current
- Products: Textron 58, 58A, 95-55, 95-A55, 95-B55, 95-B55A, 95-B55B, 95-C55, 95-C55A, D55, D55A, E55 and 1 more
- Effective: January 5, 1972
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1371
- Registered aircraft: 2,397 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/775903E06BCA361986256A08007354E6.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/72-01-02

## The airworthiness directive

72-01-02 BEECH: Amdt. 39-1371. Applies to following airplanes:

MODELS SERIAL NUMBERS AFFECTED 95-55 TC-1 thru TC-190 95-A55 TC-191 thru TC-501 (except TC-350 & TC-371) 95-B55 and 95-B55A TC-371, TC-520 thru TC-1409 95-B55B TF-1 thru TF-70 95-C55 and 95-C55A TC-350, TE-1 thru TE-451 D55 and D55A TE-452 thru TE-767 E55 and E55A TE-768 thru TE-846 58 and 58A TH-1 thru TH-173

Compliance: Required as indicated, unless already accomplished.

To prevent engine damage from loss of lubricant due to accidental opening of oil sump drains by age stiffened plastic drain hoses, within 25 hours' time in service after the effective date of this AD, accomplish the following:

Remove the oil drain tubes from the sump drain valves.

Beechcraft Service Instructions No. 0473-241 pertains to this same subject.

This amendment becomes effective January 5, 1972.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A16](https://openairdocs.org/tcds/3A16): Textron Aviation Inc.; names 13 of 21 models: 95-B55, 95-C55A, D55, 58, 95-A55, D55A, 95-C55, E55…

## 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: 2,397 (2,397 by airframe model, 0 by engine model)
- Makers: Beech 2,209, Raytheon 188

Models with the most aircraft:

- [Beech 95-B55 (T42A)](https://openairdocs.org/model/beech-95-b55-t42a): 774 aircraft (airframe model)
- [Beech 58](https://openairdocs.org/model/beech-58): 726 aircraft (airframe model)
- [Beech E-55](https://openairdocs.org/model/beech-e-55): 215 aircraft (airframe model)
- [Raytheon 58](https://openairdocs.org/model/raytheon-58): 188 aircraft (airframe model)
- [Beech 95-C55](https://openairdocs.org/model/beech-95-c55): 158 aircraft (airframe model)
- [Beech D55](https://openairdocs.org/model/beech-d55): 119 aircraft (airframe model)
- [Beech 95-A55](https://openairdocs.org/model/beech-95-a55): 90 aircraft (airframe model)
- [Beech 95-B55](https://openairdocs.org/model/beech-95-b55): 74 aircraft (airframe model)
- [Beech 95-55](https://openairdocs.org/model/beech-95-55): 53 aircraft (airframe model)

All 9 models: https://openairdocs.org/ad/72-01-02/models.md
Every aircraft: https://openairdocs.org/ad/72-01-02/aircraft.md

Its text cites no advisory circulars or STCs.

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