AD 2006-19-04

final rule
Data completeness: 80%

Airworthiness Directives; Honeywell RCZ-833J/K, -851J/K, and -854J Communication (COM) Units, Equipped with XS-852E/F Mode S Transponders; and Honeywell XS-856A/B and -857A Mode S Transponders; Installed on But Not Limited to Certain Transport Category Airplanes

AD Number
2006-19-04
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. FAA-2006-24639
FR Citation
71 FR 53553

Applicability

TypeManufacturerModelDetails
engine Honeywell RCZ-833J/K Airworthiness Directives; Honeywell RCZ-833J/K, -851J/K, and -854J Communication (COM) Units, Equipped with XS-852E/F Mode S Transponders; and Honeywell XS-856A/B and -857A Mode S Transponders; Installed on But Not Limited to Certain Transport Category Airplanes

Unsafe Condition

The transponder erroneously going into standby mode if the flightcrew takes longer than five seconds when using the rotary knob of the radio management unit to change the ATC code.

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Required Actions

Revise the Normal Procedures section of the airplane flight manual to advise the flightcrew to check the status of the transponder after changing the ATC code. Replace certain identification plate(s) with new plate(s). Test certain COM units or transponders as applicable, and take corrective action if necessary. For certain airplanes, replace the transponders of certain COM units with new or modified transponders. For certain other airplanes, install a modification into certain transponders.

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Compliance Time

Within 14 days of the effective date

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Affected Aircraft

Honeywell RCZ-833J/K, -851J/K, and -854J Communication (COM) Units equipped with XS-852E/F Mode S Transponders; and Honeywell XS-856A/B and -857A Mode S Transponders, installed on but not limited to certain transport category airplanes. Excludes Dassault Model Mystere-Falcon 900 and Model Falcon 2000 airplanes.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 4, 2026

Rights: U.S. Government Public Domain

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