83-21-05: Pitot Probe Heater Modifications

FAA order 83-21-05 is an airworthiness directive in force since November 28, 1983. The FAA's subject line: Pitot Probe Heater Modifications. It names Airbus A300: about 120 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: instruments and avionics.

What it applies to as the FAA lists it

Kind of product: Aircraft
Makes: Airbus
Models: A300 B2-1A, A300 B2-1C, A300 B2-203, A300 B2K-3C, A300 B4-103, A300 B4-203, A300 B4-2C
On this site: Airbus A300 120 registered

Dates and paperwork

In force since: November 28, 1983
Docket: Unknown
Status: Current
The FAA's document: Read the order on the FAA's site

The order itself the regulatory text, as published

Show the full text (928 characters)

83-21-05  AIRBUS INDUSTRIE:  Amendment 39-4749.  Applies to all model A300 series airplanes listed in Airbus Industrie Service Bulletin A300-30-026, certificated in all categories.  To prevent loss of all airspeed indications, accomplish the following within the next 1800 flight hours after the effective date of this AD, unless already accomplished:
 
	A.	Modify the pitot probe heater in accordance with Airbus Industrie Service Bulletin A300-30-026, Revision 6, dated April 9, 1982.	
 
	B.	Alternate means of compliance which provide an equivalent level of safety may be used if approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. 

	C.	Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. 

	This amendment becomes effective November 28, 1983.

Related safety bulletins advice on the same designs, not orders

2019-02-19NE-19-03 · Escape Slide Maintenance Tasks and Intervals - JASC 2565

2008-12-11NM-09-03 · Engine Fuel and Control - Implementing Fuel Tank System Airworthiness Limitations

2008-07-02NM-08-31 · Equipment/Furnishings: Non-Textile Floors

2006-12-11SW-07-13 · Oxygen Reserve Cylinder

2006-07-27NM-06-57 · Reports of damage to airplanes and to property on the ground caused by blue or clear ice falling from airplanes.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/83-21-05.json · aircraft systems.