AD 74-20-02

final rule
Data completeness: 60%

BOEING Model 737 Airplanes

AD Number
74-20-02
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft The Boeing Company 737-100 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-200 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-200C Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-300 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-400 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-500 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-600 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-700 Series BOEING Model 737 Airplanes
aircraft The Boeing Company 737-800 Series BOEING Model 737 Airplanes

Unsafe Condition

Erroneous information displayed on pitot-static flight instruments due to inadequate vertical rise in pitot static tubing inboard of each pitot-static probe.

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Required Actions

Modify the pitot static tubing to include a vertical rise just inboard of each pitot-static probe in accordance with Boeing Service Bulletin 737-34-1031 or later FAA approved revisions. The modification must be done in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA, Northwest Region.

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Compliance Time

Within the next 3500 hours time in service after the effective date of this AD

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Affected Aircraft

All Model 737 airplanes, certificated in all categories, listed in Boeing Service Bulletin 737-34-1031 dated March 1, 1974, or later FAA approved revisions.

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Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for The Boeing Company 737-100 Series

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2004-03-34 R1

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