AD 89-18-07 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | BAe.125 Series 1000A | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 1000B | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (C-29A) | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800A (U-125) | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BAe.125 Series 800B | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 400A | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | BH.125 Series 600A | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
| aircraft | Textron Aviation Inc. | DH.125 Series 1A-522 | Airworthiness Directives; RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 Series Airplanes |
Unsafe Condition
Corrosion in the elevator mass balance weight side plate assembly and balance weight spigot could cause control surface interference and jamming of flight controls.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the elevator mass balance weight side plate assembly and balance weight spigot for corrosion per British Aerospace Service Bulletin 27-142, repair detected corrosion before further flight, apply corrosion protection treatment, and install specified Monel or British Standard Specification rivets as per the service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 3 years since the date of airplane manufacture, or within 60 days after September 21, 1989, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
RAYTHEON AIRCRAFT COMPANY Model BAe.125, DH.125, BH.125, and HS.125 series airplanes up to and including series 700.
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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