# AD 77-23-04: Total-Pressure Probes

- Type: Airworthiness directive
- Status: Current
- Products: Dassault Falcon 10
- Effective: December 10, 1977
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3075
- Registered aircraft: 59 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5120DAC0F01DBDEF8625698B005C15F4.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/77-23-04

## The airworthiness directive

77-23-04 AVIONS MARCEL DASSAULT-BREGUET AVIATION (AMD-BA): Amendment 39-3075. Applies to Model Falcon 10 airplanes, S/N 1 through 56, certificated in all categories, and any other Model Falcon 10 airplane incorporating Badin Crouzet total-pressure probes, P/N 33790-10.

Compliance is required as indicated.

To prevent failure of total-pressure probe accomplish the following:

  (a) Prior to the accumulation of 600 total airplane flights or within the next 100 flights after the effective date of this AD, whichever occurs later, replace both total-pressure probes, P/N 33790-10, with new parts of the same part number, or with probes of improved design, P/N 33790-20, in accordance with paragraph 2 of Falcon 10 Service Bulletin No. F10.34.007, dated July 17, 1975, or an equivalent approved by the Chief, Aircraft Certification Staff for Europe, Africa, and Middle East Region, c/o American Embassy, A.P.O. New York, N.Y. 09667.

  (b) Replacement probes P/N 33790-10 are hereby life limited to 600 flights.

  (c) For the purpose of this AD, a flight is defined as a single takeoff and landing. If records are not maintained of each takeoff and landing, the number of flights may be determined by dividing each airplane's hours time in service by the operator's fleet average time from takeoff to landing for the airplane type, subject to acceptance by the assigned FAA airworthiness inspector.

This amendment becomes effective December 10, 1977.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A33EU](https://openairdocs.org/tcds/A33EU): Dassault Aviation; names 1 of 1 models: Falcon 10

## 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: 59 (59 by airframe model, 0 by engine model)
- Makers: Dassault-Breguet 56, Avion Marcel Dassault Breguet 2, Avions Marcel Dassault Breguet 1

Models with the most aircraft:

- [Dassault-Breguet FALCON 10](https://openairdocs.org/model/dassault-breguet-falcon-10): 56 aircraft (airframe model)
- [Avion Marcel Dassault Breguet FALCON 10](https://openairdocs.org/model/avion-marcel-dassault-breguet-falcon-10): 2 aircraft (airframe model)
- [Avions Marcel Dassault Breguet FALCON 10](https://openairdocs.org/model/avions-marcel-dassault-breguet-falcon-10): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/77-23-04/models.md
Every aircraft: https://openairdocs.org/ad/77-23-04/aircraft.md

Its text cites no advisory circulars or STCs.

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