# AD 56-14-02: Landing Gear Axle

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC3-G102, DC3-G102A, DC3-G103A, DC3-G202A, DC3A-S1C3G, DC3A-S1CG, DC3A-S4C4G, DC3A-SC3G, DC3A-SCG, DC3C-R-1830-90C, DC3C-S1C3G, DC3C-S4C4G and 2 more
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 61 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E83D4330C3A27F94862569BC00662391.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/56-14-02

## The airworthiness directive

56-14-02 DOUGLAS: Applies to All DC3 Series Aircraft Operated at Weights in Excess of 25,200 Pounds.

Compliance required as indicated.

It has come to our attention that there are numerous instances wherein DC3 Series Aircraft have been approved for operation at landing and takeoff weights in excess of 25,200 pounds, in accordance with pertinent notes of Aircraft Specifications A-618 or A-669, that have main landing gear axle assemblies installed which are structurally unsatisfactory for the higher weights. The two axle assemblies involved are DACO P/N 5007396, and P/N 5007162 with P/N 5007390 torque collar.

Therefore, all DC3 Series Aircraft in which either of these assemblies is installed must be operated at weights not to exceed 25,200 pounds for landing or takeoff (25,346 lbs. if deicers are installed) until satisfactory axle assemblies are installed. Note 9 of DC3 Aircraft Specification A-618 and Note 10 of DC3A Aircraft Specification A-669 contain a list of axle assemblies and the maximum weights for which each is structurally satisfactory.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-669](https://openairdocs.org/tcds/A-669): The Boeing Company; names 10 of 10 models: DC3C-S4C4G, DC3C-R-1830-90C, DC3A-S1C3G, DC3C-SC3G, DC3C-S1C3G, DC3A-SCG, DC3A-SC3G, DC3A-S1CG…
- [TCDS A-618](https://openairdocs.org/tcds/A-618): The Boeing Company; names 4 of 4 models: DC3-G202A, DC3-G102A, DC3-G103A, DC3-G102

## 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: 61 (61 by airframe model, 0 by engine model)
- Makers: Douglas 61

Models with the most aircraft:

- [Douglas DC3C-S1C3G](https://openairdocs.org/model/douglas-dc3c-s1c3g): 30 aircraft (airframe model)
- [Douglas DC3C-R-1830-90C](https://openairdocs.org/model/douglas-dc3c-r-1830-90c): 10 aircraft (airframe model)
- [Douglas DC3-G202A](https://openairdocs.org/model/douglas-dc3-g202a): 7 aircraft (airframe model)
- [Douglas DC-3A-S1C3G](https://openairdocs.org/model/douglas-dc-3a-s1c3g): 5 aircraft (airframe model)
- [Douglas DC3C-S4C4G](https://openairdocs.org/model/douglas-dc3c-s4c4g): 5 aircraft (airframe model)
- [Douglas DC3A-S4C4G](https://openairdocs.org/model/douglas-dc3a-s4c4g): 2 aircraft (airframe model)
- [Douglas DC3-G102A](https://openairdocs.org/model/douglas-dc3-g102a): 1 aircraft (airframe model)
- [Douglas DC3C-SC3G](https://openairdocs.org/model/douglas-dc3c-sc3g): 1 aircraft (airframe model)

All 8 models: https://openairdocs.org/ad/56-14-02/models.md
Every aircraft: https://openairdocs.org/ad/56-14-02/aircraft.md

Its text cites no advisory circulars or STCs.

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