# AD 70-07-02: Walkway Panel Failures

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body, 707-200, 707-300 Series, 707-300B Series, 707-300C Series, 707-400 Series, 720 Series and 720B Series
- Effective: March 28, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-961
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC5B7E333206ACC686256831006B6A3F.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-07-02

## The airworthiness directive

70-07-02 BOEING: Amdt. 39-961. Applies to Model 707 and 720 Series airplanes listed in Boeing Service Bulletin No. 2961, Revision 1, or later FAA-approved revisions.

Compliance required within the next 50 hours' time in service after the effective date of this AD on aircraft having 14,000 or more flights, unless already accomplished. Aircraft having less than 14,000 flights on the effective date of this AD must be inspected after they have accrued 13,000 flights but no later than 50 hours' time in service after they have accrued 14,000 flights, unless already accomplished during this specified interval.

For the purpose of compliance with this AD, the number of flights may be determined by dividing the total flight time on an airplane by the operator's fleet average flight time per flight for the type airplane considered.

To prevent walkway panel failures between body stations 344 and 352:

  (a) Inspect the left-hand and right-hand walkway panels on all airplaneslisted in Boeing Service Bulletin 2961, Revision 1, or later FAA-approved revisions. Perform inspections in accordance with Accomplishment Instruction, Part II, unless already accomplished in accordance with Service Bulletin 2961, dated 13 January 1970, or an equivalent inspection approved by the Chief, Aircraft Engineering Division, FAA Western Region.

  (b) If no cracks are found, perform:

  (1) The preventative modification described in Part II of Boeing Service Bulletin 2961, Revision 1, dated 11 March 1970, or later FAA-approved revisions, or

  (2) Reinspections at intervals not to exceed 1500 flights in service (for eddy current or dye penetrant inspection) or 500 flights (for visual inspection) in accordance with Part II of Boeing Service Bulletin 2961, Revision 1, or

  (3) An equivalent modification or inspection program approved by the Chief, Aircraft Engineering Division, FAA Western Region.

  (c) If cracks are found during any of the inspections, perform the preventative modification in accordance with Part II of Boeing Service Bulletin 2961, Revision 1, 11 March 1970, or later FAA-approved revisions, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region, prior to further flight.

Inspections required by this AD may be discontinued when the approved preventative modification has been accomplished.

This supersedes Amendment 39-932, 35 F.R. 1159, AD 70-02-12.

This amendment becomes effective March 28, 1970.

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A21](https://openairdocs.org/tcds/4A21): The Boeing Company; names 4 of 4 models: 707-100B Short Body, 707-200, 707-100 Long Body, 707-100B Long Body
- [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 4 of 4 models: 707-300B Series, 707-400 Series, 707-300 Series, 707-300C Series
- [TCDS 4A28](https://openairdocs.org/tcds/4A28): The Boeing Company; names 2 of 2 models: 720B Series, 720 Series

## 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: 6 (6 by airframe model, 0 by engine model)
- Makers: Boeing 6

Models with the most aircraft:

- [Boeing 707-338C](https://openairdocs.org/model/boeing-707-338c): 2 aircraft (airframe model)
- [Boeing 707-368C](https://openairdocs.org/model/boeing-707-368c): 1 aircraft (airframe model)
- [Boeing 707-321B](https://openairdocs.org/model/boeing-707-321b): 1 aircraft (airframe model)
- [Boeing 707-323B](https://openairdocs.org/model/boeing-707-323b): 1 aircraft (airframe model)
- [Boeing 707-351B](https://openairdocs.org/model/boeing-707-351b): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/70-07-02/models.md
Every aircraft: https://openairdocs.org/ad/70-07-02/aircraft.md

Its text cites no advisory circulars or STCs.

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