AD 87-16-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Honeywell, Inc. | Electronic Flight Instrument Systems | Airworthiness Directives; (HONEYWELL, INC., SPERRY COMMERCIAL FLIGHT SYSTEMS DIVISION (formerly Sperry Corporation, Aerospace and Marine Group): Applies To All Digital And Analog Electronic Flight Instrument Systems (EFIS) Models |
Unsafe Condition
Erroneous display of the angle of attack fast/slow presentation in the Electronic Flight Instrument Systems (EFIS) Models EDZ 601, 603, 801, 803, 611, and 811 installations with a multifunction display symbol generator.
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Required Actions
Exchange Multifunction Display Symbol Generator (MG) parts with those having Modification K or subsequent for analog EFIS equipment and Modification L or subsequent for digital EFIS equipment, following Honeywell Service Bulletins 21-1986-200 and 21-1987-06 respectively. Alternate means of compliance may be approved by the FAA, and special flight permits can be issued for ferrying aircraft to maintenance bases.
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Compliance Time
within 30 days after the effective date of this AD, unless previously accomplished
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Affected Aircraft
Honeywell, Inc. SPERRY COMMERCIAL FLIGHT SYSTEMS DIVISION's Electronic Flight Instrument Systems (EFIS) Models EDZ 601, 603, 801, 803, 611, and 811 installations with a multifunction display symbol generator.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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