AD 2002-08-20

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 737-600, -700, -700C, and -800 Series Airplanes

AD Number
2002-08-20
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 2002-NM-76-AD
FR Citation
67 FR 20628

Applicability

TypeManufacturerModelDetails
aircraft Boeing 737-600 Airworthiness Directives; Boeing Model 737-600, -700, -700C, and -800 Series Airplanes

Unsafe Condition

Accumulation of fluid or residue in the balance bays and foreign substances on the external surfaces of the elevator tab can lead to limit cycle oscillation, severe vibration, flutter, and loss of controllability of the airplane.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Inspect the airplane following any suspected limit cycle oscillation (LCO) of the elevator tab. Revise the airplane flight manual (AFM) to limit airspeeds under certain conditions and provide flight crew information regarding elevator tab LCO. Clean the elevator tab repetitively and perform a one-time cleaning of the elevator balance bays. Optionally, clean the elevator tab and balance bays following every deicing/anti-icing of the horizontal stabilizer. For certain airplanes, trim the elevator balance panel seals to terminate optional repetitive cleaning procedures for the balance bays.

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Compliance Time

Before further flight

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Affected Aircraft

All Boeing Model 737-600, -700, -700C, and -800 series airplanes.

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Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

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