- Effective
- August 1, 1984
- Model
- 727-100 Series
- Data sheet
- TCDSA3WE
- Product
- Aircraft · Large airplane
- Amendment
- 39-4889
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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|---|---|---|---|
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On this page
The airworthiness directive
84-08-05 R1 BOEING: Amendment 39-4852 as amended by Amendment 39-4889. Applies to Boeing Model 727-100 airplanes modified to install a Performance Data Computer under STC SA1602NM. To preclude the loss of airspeed information due to conditions related to the pitot- static system, accomplish the following no later than November 5, 1984, unless already accomplished.
A) Connect the first and second pilots' flight instruments to the appropriate pitot-static systems to conform with Civil Air Regulations (CAR) 4b.612 using a means approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.
B) Perform a leak check of the pitot-static system in accordance with Federal Aviation Regulations (FAR) Part 91.170.
C) Perform a functional test of the air data system.
D) Perform a functional check of the pitot heat system.
E) Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.
Amendment 39-4852 became effective May 7, 1984. This Amendment 39-4889 becomes effective August 1, 1984.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.