# AD 60-08-02: Longeron Cracks

- Type: Airworthiness directive
- Status: Current
- Products: Boeing Airplane Company, Wichita Division 75 (Army PT-13), A75 (Army PT-13A, -13B, -13C), A75J1 (Army PT-18), A75L3, A75L300, A75N1 (Army PT-17, -17A, Navy N2S-1, -4), B75 (Navy N2S-5), B75N1 (Navy N2S-3), D75N1 (Army PT-27), E75 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5), E75N1 (Army PT-13D, Navy N2S-5, PT-13D/N2S-5) and IB75A
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 1,654 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3E1090C4CDFABFC186256A34005BC1B7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/60-08-02

## The airworthiness directive

60-08-02 BOEING: Amdt. 131 Part 507 Federal Register April 9, 1960. Applies to All Model 75 Series Aircraft Operated in Restricted Category With a Gross Weight Exceeding 3,200 Pounds.

Compliance required not later than June 1, 1960, and at each 100 hours' time in service thereafter.

Due to reports of cracked longerons, the following shall be accomplished:

Visually inspect the fuselage longerons and fuselage diagonal bracing for cracks in the vicinity of the lower wing front spar attach fittings. All cracked structural members shall be repaired or replaced in accordance with CAR 18.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-743](https://openairdocs.org/tcds/A-743): The Boeing Company; names 12 of 12 models: B75N1 (Navy N2S-3), 75 (Army PT-13), A75J1 (Army PT-18), E75 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5), A75L3, E75N1 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5), A75L300, A75 (Army PT-13A; -13B; -13C)…

## 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: 1,654 (1,654 by airframe model, 0 by engine model)
- Makers: Boeing 1,642, Boeing Stearman/Huff 1, Boeing/Cains Richard G 1, Boeing/Dekker 1, Boeing/Hawk 1, Boeing/Humm Stanley 1, Boeing/Johnson 1, Boeing/Mays 1, Boeing/Mehrer 1, Boeing/Mountain View Air Rep 1

Models with the most aircraft:

- [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17): 759 aircraft (airframe model)
- [Boeing E75](https://openairdocs.org/model/boeing-e75): 261 aircraft (airframe model)
- [Boeing B75N1](https://openairdocs.org/model/boeing-b75n1): 241 aircraft (airframe model)
- [Boeing A75](https://openairdocs.org/model/boeing-a75): 93 aircraft (airframe model)
- [Boeing E75N1](https://openairdocs.org/model/boeing-e75n1): 79 aircraft (airframe model)
- [Boeing A75N1](https://openairdocs.org/model/boeing-a75n1): 59 aircraft (airframe model)
- [Boeing D75N1](https://openairdocs.org/model/boeing-d75n1): 35 aircraft (airframe model)
- [Boeing A75L300](https://openairdocs.org/model/boeing-a75l300): 33 aircraft (airframe model)
- [Boeing A75L3](https://openairdocs.org/model/boeing-a75l3): 32 aircraft (airframe model)
- [Boeing 75](https://openairdocs.org/model/boeing-75): 18 aircraft (airframe model)
- [Boeing B75](https://openairdocs.org/model/boeing-b75): 15 aircraft (airframe model)
- [Boeing IB75A](https://openairdocs.org/model/boeing-ib75a): 12 aircraft (airframe model)
- [Boeing E75(N2S-5)](https://openairdocs.org/model/boeing-e75-n2s-5): 2 aircraft (airframe model)
- [Boeing A75J1](https://openairdocs.org/model/boeing-a75j1): 2 aircraft (airframe model)
- [Boeing/Smith A75N1](https://openairdocs.org/model/boeing-smith-a75n1): 1 aircraft (airframe model)
- [Boeing/Dekker A75N1](https://openairdocs.org/model/boeing-dekker-a75n1): 1 aircraft (airframe model)
- [Boeing Stearman/Huff A75-N1](https://openairdocs.org/model/boeing-stearman-huff-a75-n1): 1 aircraft (airframe model)
- [Boeing/Mays A75N1](https://openairdocs.org/model/boeing-mays-a75n1): 1 aircraft (airframe model)
- [Boeing/Hawk E-75](https://openairdocs.org/model/boeing-hawk-e-75): 1 aircraft (airframe model)
- [Boeing/Porter/Epperson B-75N1](https://openairdocs.org/model/boeing-porter-epperson-b-75n1): 1 aircraft (airframe model)

All 27 models: https://openairdocs.org/ad/60-08-02/models.md
Every aircraft: https://openairdocs.org/ad/60-08-02/aircraft.md

Its text cites no advisory circulars or STCs.

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