# AD 48-27-03: Propeller Hub Peening

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed 649-79 and 749-79
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB201B47BDD27A598625696D0071A5DB.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/48-27-03

## The airworthiness directive

48-27-03 LOCKHEED: Applies to 649 and 749 Series Airplanes Equipped With Curtiss C632S-A/850-4C2-0 Propellers.

Compliance required by August 1, 1948, and February 1, 1949.

To increase the ability of the propeller hubs to withstand excessive stresses under certain operating conditions the hubs must be returned to Curtiss-Wright Corp., Propeller Division for shotpeening of the threaded portion of the hub barrels. Effective August 1, 1948, hubs not peened before accumulating 2,500 hours of operating time are to be permanently removed from Constellation operation. Hubs not peened before accumulating 2,000 hours of operating time are to be temporarily withdrawn from operation until shotpeened. Peening must be accomplished on all hubs by February 1, 1949, regardless of accumulated operating time.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-763](https://openairdocs.org/tcds/A-763): Lockheed Martin Aeronautics Company; names 2 of 6 models: 649-79, 749-79

## 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 (1 by airframe model, 0 by engine model)
- Makers: Lockheed 1

Models with the most aircraft:

- [Lockheed 749-79](https://openairdocs.org/model/lockheed-749-79): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/48-27-03/models.md
Every aircraft: https://openairdocs.org/ad/48-27-03/aircraft.md

Its text cites no advisory circulars or STCs.

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