# AD 81-14-01: Rudder Upper Hinge Support

- Type: Airworthiness directive
- Status: Current
- Products: Embraer EMB-110P1 and EMB-110P2
- Effective: July 1, 1981
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small/large airplane
- Amendment: 39-4145
- Registered aircraft: 13 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5727FE5559E91FEE862569ED00657792.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-14-01

## The airworthiness directive

81-14-01 EMBRAER: Amendment 39-4145. Models EMB-110P1 and EMB-110P2, Serial Numbers 110001 through 110226, certificated in all categories.

Compliance is required as indicated, unless already accomplished.

To prevent failure of the rudder upper hinge support and associated structure of the vertical stabilizer, accomplish the following within the next 100 hours time in service after the effective date of the AD:

  (a) Remove the two existing rudder leading edge fairings adjacent to the rudder upper hinge and conduct a dye-penetrant inspection of the entire rudder upper hinge support (fin side).

  (b) If the inspection reveals no cracks or only small cracks limited to Area "A" (See Figure 1), reinforce the support as indicated in Figure 2 and in accordance with the instructions contained in EMBRAER Service Bulletin Number 110-55-017, dated December 11, 1980.

  (c) If one or more cracks are found in other areas of the hinge support, replace the rudder upper hinge support with a new support (P/N 110-3348) in accordance with the instructions contained in EMBRAER Service Bulletin Number 110-55-017, dated December 11, 1980.

  (d) Make appropriate maintenance record entry.

An equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.

This amendment becomes effective July 1, 1981.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A21SO](https://openairdocs.org/tcds/A21SO): Embraer S.A.; names 2 of 2 models: EMB-110P1, EMB-110P2

## 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: 13 (13 by airframe model, 0 by engine model)
- Makers: Embraer 13

Models with the most aircraft:

- [Embraer EMB-110P1](https://openairdocs.org/model/embraer-emb-110p1): 13 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/81-14-01/models.md
Every aircraft: https://openairdocs.org/ad/81-14-01/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.