AD 78-13-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | BRITISH AEROSPACE Model BH/HS-125 Series 600A and 700A Airplanes |
| aircraft | Textron Aviation Inc. | HS.125 Series 600A | BRITISH AEROSPACE Model BH/HS-125 Series 600A and 700A Airplanes |
| aircraft | Textron Aviation Inc. | HS.125 Series 700A | BRITISH AEROSPACE Model BH/HS-125 Series 600A and 700A Airplanes |
Unsafe Condition
Failure of the restraint provisions for the weather radar receiver/transmitter due to cracks in support brackets or failure of the brazing of the 'T' bolts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect support brackets for cracks and 'T' bolts for brazing failure within 10 hours time in service after AD effective date, or within last 40 hours if already done. Repeat inspections at intervals not exceeding 50 hours time in service. Replace mounting tray with serviceable part or repair per FAA-approved scheme if defects found, or replace with improved P/N 1719353-501 tray to discontinue inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours time in service after the effective date of this AD, unless already accomplished within the last 40 hours time in service, and thereafter at intervals not to exceed 50 hours time in service from the last inspection
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hawker Siddeley Model BH/HS-125 Series 600A and 700A airplanes with RCA AVQ21 or Primus 40 weather radar systems installed.
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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