AD 99-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-700 Series | Airworthiness Directives; BOEING Model 737-700 and -800 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | Airworthiness Directives; BOEING Model 737-700 and -800 Series Airplanes |
Unsafe Condition
Fracturing of the elevator tab mast fitting and excessive freeplay in the elevator tab leading to loss of controllability.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Airplane Flight Manual (AFM) to prohibit operation above FL 390 and deployment of spoilers at speeds over 310 knots IAS with speed brakes extended. Perform repetitive inspections of the tab mast fitting for cracking, elevator tab freeplay checks, and install an additional fastener on the fitting to terminate AFM revisions and extend inspection intervals. Optional terminating action includes replacing the fitting with an improved design.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight after landing if emergency spoiler deployment occurred above specified limits.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 737-700 and -800 series airplanes with line numbers 1 through 190.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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