AD 90-08-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (C-29A) | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (U-125) | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
| aircraft | Textron Aviation Inc. | HS.125 Series 700A | Airworthiness Directives; BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A Series Airplanes |
Unsafe Condition
Loss of aileron control due to water system pressure pump activation interfering with aileron control system components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Drain all water from the aft lavatory water system reservoir, deactivate the water system pressure pump by pulling the circuit breaker beneath the vanity, install a tie wrap on the circuit breaker to prevent reset, and obtain approval for reactivation or alternate compliance from the Manager, Special Programs Office, ASW-190, FAA, Southwest Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required prior to further flight, unless previously accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BRITISH AEROSPACE Model BH.125-600A, HS.125-700A, and BAe 125-800A series airplanes equipped with cabin interior and aft lavatory water system installed per STC SA2271SW.
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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