# AD 70-09-04: Tire Tread Separation

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, DC-9-32 (VC-9C), DC-9-32F, DC-9-32F (C-9A) and 10 more
- Effective: June 2, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-982
- Registered aircraft: 99 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E8DE53B10F037C64862569C90069E00C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-09-04

## The airworthiness directive

70-09-04 MCDONNELL DOUGLAS: Amdt. 39-982. Applies to Douglas DC-9 series airplanes certificated in all categories as listed in Douglas Aircraft Company Service Bulletin No. 28-16, Revision 1, dated January 9, 1970, or later FAA approved revision.

Compliance required within the next 800 hours time in service after the effective date of this AD, unless already accomplished.

To prevent a possible fuel interruption due to tire tread separation striking the fire-x-fuel shutoff valve cable system, accomplish the following.

Install a protective guard over the fire-x-fuel shutoff valve return idler pulley bracket located in the main landing gear wheel wells in accordance with the instructions of Douglas Aircraft Co. Service Bulletin No. 28-16, Revision 1, dated January 9, 1970, or later FAA approved revision or an equivalent installation approved by the Chief, Aircraft Engineering Division, FAA Western Region.

This amendment becomes effective June 2, 1970.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A6WE](https://openairdocs.org/tcds/A6WE): The Boeing Company; names 19 of 25 models: DC-9-12, DC-9-15F, DC-9-41, DC-9-13, DC-9-34F, DC-9-81 (MD-81), DC-9-33F, DC-9-83 (MD-83)…

## 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: 99 (99 by airframe model, 0 by engine model)
- Makers: Mcdonnell Douglas 93, Douglas 6

Models with the most aircraft:

- [Mcdonnell Douglas DC-9-83(MD-83)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-83-md-83): 49 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-82(MD-82)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82): 22 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-87](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87): 13 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-15F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-15f): 3 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-33F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-33f): 3 aircraft (airframe model)
- [Douglas DC-9-83](https://openairdocs.org/model/douglas-dc-9-83): 1 aircraft (airframe model)
- [Douglas DC9-15](https://openairdocs.org/model/douglas-dc9-15): 1 aircraft (airframe model)
- [Douglas DC-9-15F](https://openairdocs.org/model/douglas-dc-9-15f): 1 aircraft (airframe model)
- [Douglas DC-9-21](https://openairdocs.org/model/douglas-dc-9-21): 1 aircraft (airframe model)
- [Douglas DC-9-32F](https://openairdocs.org/model/douglas-dc-9-32f): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-32F](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32f): 1 aircraft (airframe model)
- [Douglas DC-9-33F](https://openairdocs.org/model/douglas-dc-9-33f): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-87 (MD-87)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87-md-87): 1 aircraft (airframe model)

All 14 models: https://openairdocs.org/ad/70-09-04/models.md
Every aircraft: https://openairdocs.org/ad/70-09-04/aircraft.md

Its text cites no advisory circulars or STCs.

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