# AD 60-06-01: Nose Landing Gear - 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Series, 707-300B Series, 707-300C Series, 707-400 Series, 720 Series and 720B Series - Effective: May 14, 1966 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/470098C78F52E5C186256CC400706A03.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/60-06-01 ## The airworthiness directive 60-06-01 BOEING: Amdt. 111 Part 507 Federal Register March 8, 1960. Applies to Models 707 and 720 Series Airplanes Equipped with Nose Gear Outer Cylinder, Boeing P/N 5-83025- 3005. Compliance required as indicated. Due to failures found in the nose landing gear outer cylinder as a result of initial defects, the following inspections are required unless already accomplished: (a) Conduct a daily visual inspection with a 10-power magnifying glass for cracks in the outer surface of the nose gear outer cylinder in the upper barrel area of the trunnion, and in the area below the towing collar. Outer cylinders with cracks appearing on the outer surface must be replaced prior to further flight. Further inspection is not required on replacement part. This inspection must be continued until item (b) is accomplished. (b) Within 20 calendar days, inspect the areas described in (a) with probe type ultrasonic shear wave equipment or equivalent. Outer cylinders with cracks on the outer surface or with crack indications that exceed 1 inch in length must be replaced prior to further flight. Cylinders with crack indications 1 inch or less in length may be retained in service, provided: (1) A daily visual inspection as in (a) is continued and the ultrasonic inspections or equivalent are repeated every 20 landings. (2) A dye penetrant inspection or equivalent of the interior surface of the outer cylinder is accomplished within 550 hours' time in service and every 550 hours' time in service thereafter. (c) If no cracks or crack indications are found by inspections (a) and (b), the nose landing gear may revert to normal inspection procedures and periods except for accomplishing (d). (d) Conduct a dye penetrant inspection or equivalent for cracks on the interior surface of all nose gear outer cylinders within the next 3,000 hours' time in service. Outer cylinders with cracks on the interior surface that exceed 1 inch in length or that extend to the outer surface must be replaced prior to further flight. Cylinders with cracks 1 inch or less in length on the interior surface may be retained in service provided the cracks do not extend to the outer surface and the cylinders are inspected in accordance with (b)(1) and (b)(2). Operators may accomplish this inspection within the next 1,500 landings occurring subsequent to March 8, 1960, in lieu of the next 3,000 hours' time in service. (It will be necessary for operators to maintain a record of landings to ascertain compliance. If past records are unavailable, the number of prior landings may be estimated.) (Boeing Wire Service Bulletin No. 739 pertains to the above subject.) Revised November 18, 1960. Revised May 14, 1966. ## 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/60-06-01/models.md Every aircraft: https://openairdocs.org/ad/60-06-01/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.