AD 90-07-10 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 550 | Airworthiness Directives; CESSNA CITATION Model 550, 551, and S550 Series Airplanes |
| aircraft | Cessna Aircraft Company | 551 | Airworthiness Directives; CESSNA CITATION Model 550, 551, and S550 Series Airplanes |
| aircraft | Cessna Aircraft Company | S550 | Airworthiness Directives; CESSNA CITATION Model 550, 551, and S550 Series Airplanes |
Unsafe Condition
Failure of the elevator or rudder control cables due to damage caused by electrical arcing and interference from the STC SA2698SW Freon Air Conditioners.
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Required Actions
Deactivate the air conditioning system by pulling the supply breakers and installing tie wraps on the breakers before further flight. Within 10 hours time-in-service, inspect elevator control cables under and near the aft baggage compartment floor for damage from electrical arcing and interference. Replace damaged cables immediately. If mounting hardware interferes with cables, replace it per Keith Service Bulletin No. 108. Replace inboard mounting rail hardware and ground wire before reactivating the system. Alternate compliance may be approved by the FAA Manager, Special Programs Office.
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Compliance Time
Prior to further flight and within the next 10 hours time-in-service
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Affected Aircraft
Cessna Model 550, 551, and S550 series airplanes equipped with STC SA2698SW Freon Air Conditioners installed in the aft section of the baggage compartment.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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