AD 49-49-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Aircraft Corporation | 49-46 | LOCKHEED Model 49 Series Aircraft |
Unsafe Condition
Failure of the Eclipse-Pioneer Model PB-10 automatic pilot could result in uncommanded control surface movements due to improper signal routing and insufficient servo forces safeguarding.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the master direction indicator and wiring to reroute rudder channel signals to the aileron channel; install resistors in series with the variable phase of aileron, rudder, and elevator servo motors; install aileron servo disconnect interlock switch and rewire its connection from the rudder servo disconnect interlock switch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to reconnection in the aircraft
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Affected Aircraft
Lockheed Aircraft Corporation Model 49 Series aircraft equipped with Eclipse-Pioneer Model PB-10 automatic pilots
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
PB-10 Automatic Pilot
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_49-49-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 49-49-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Series Aircraft Subject: PB-10 Automatic Pilot Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 49-49-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 49-49-01 SUBJECT HEADING: LOCKHEED Model 49 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 49-49-01 LOCKHEED: Applies to All Model 49 Series Aircraft Equipped With Eclipse- Pioneer Model PB-10 Automatic Pilots. Compliance required prior to reconnection in aircraft. Prior to reconnection in the aircraft of the Eclipse-Pioneer Model PB-10 automatic pilot, it is necessary to modify the installation to include provisions designed to safeguard the aircraft in the event of malfunctioning of the autopilot. This modification has been determined to consist of the following interdependent changes: Modify the master direction indicator and wiring at the autopilot controller plug and amplifier to change the direction signal from the rudder channel to the aileron channel; install resistors in series with the variable phase of aileron, rudder and elevator servo motors to reduce servo forces; install aileron servo disconnect interlock switch and change wiring to this switch from the existing rudder servo disconnect interlock switch. An acceptable method of accomplishing this modification is described in LAC Service Bulletin No. 49/SB-576. This supersedes AD 49-36-01. FOOTER:
Document Text
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AD Final Rules - DRS_49-49-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 49-49-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 49 Series Aircraft Subject: PB-10 Automatic Pilot Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Lockheed Aircraft Corporation Model: 49-46 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 49-49-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 49-49-01 SUBJECT HEADING: LOCKHEED Model 49 Series Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 49-49-01 LOCKHEED: Applies to All Model 49 Series Aircraft Equipped With Eclipse- Pioneer Model PB-10 Automatic Pilots. Compliance required prior to reconnection in aircraft. Prior to reconnection in the aircraft of the Eclipse-Pioneer Model PB-10 automatic pilot, it is necessary to modify the installation to include provisions designed to safeguard the aircraft in the event of malfunctioning of the autopilot. This modification has been determined to consist of the following interdependent changes: Modify the master direction indicator and wiring at the autopilot controller plug and amplifier to change the direction signal from the rudder channel to the aileron channel; install resistors in series with the variable phase of aileron, rudder and elevator servo motors to reduce servo forces; install aileron servo disconnect interlock switch and change wiring to this switch from the existing rudder servo disconnect interlock switch. An acceptable method of accomplishing this modification is described in LAC Service Bulletin No. 49/SB-576. This supersedes AD 49-36-01. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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