SERVICE BULLETIN SB 52-2693, Rev. 2
Beechcraft 50 Twin Bonanza · Service Bulletins
Overview
This Service Bulletin, issued by Raytheon Aircraft Company, addresses mandatory inspections of the interior door handles for the Beechcraft 50 Twin Bonanza and several other Beechcraft models. The bulletin emphasizes the importance of ensuring that the interior cabin door and utility door handles are properly installed to prevent inadvertent unlatching. The document outlines the compliance requirements, inspection procedures, and corrective actions necessary if the handles are found to be improperly functioning. It is crucial for owners and operators to adhere to the instructions provided to maintain safety and compliance with FAA regulations. The bulletin includes detailed steps for inspection and reorientation of the door handles, as well as the estimated man-hours required for compliance.
- Mandatory inspection of interior door handles is required before the next flight.
- Improper installation of door handles can lead to inadvertent unlatching of doors.
- Inspection can be performed by a certified pilot but must be verified by a mechanic.
- Estimated time for inspection is 0.5 hours; reorientation may take 1 hour.
- The bulletin applies to multiple Beechcraft models, including the Twin Bonanza.
Document
Source
Originally published by www.bonanza.org. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Service Bulletins
- Year
- 2002
- Pages
- 6
- File size
- 101 KB
- Publisher
- www.bonanza.org
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In this document
Planning Information
The Service Bulletin applies to various Beechcraft models, including the Twin Bonanza (Models 50, B50, C50) and several Bonanza and Debonair models. It is mandatory for compliance prior to the next flight and whenever the cabin or utility door handles are removed.
Reason
The bulletin is issued to inspect the interior cabin door handle and utility door handle to ensure they are properly installed. A report indicated that the utility door could open without pressing the handle lock release button if not installed correctly.
Compliance
Compliance with the inspection is mandatory and must be completed before the next flight. A certified pilot can perform the inspection, which must also be verified by a qualified mechanic during the next annual or 100-hour inspection.
Accomplishment Instructions
The bulletin provides step-by-step instructions for inspecting both the cabin and utility door handles. If the handles are found to be improperly functioning, the bulletin includes procedures for reorienting or replacing the handles.
Estimated Manpower
The estimated man-hours for the inspection is 0.5 hours, while the removal and reorientation of the door handles may take approximately 1 hour with one person.
Safety notes
- Improperly installed door handles can result in safety hazards during flight.
- Ensure all tools and foreign objects are removed from the work area to prevent interference with door operation.
Full document text
Issued: May, 2000 Revised: January, 2002 SERVICE BULLETIN 1 of 6 Exported under the authority of license exception: TSU. "These commodities, technology or software were exported from the United States in accordance with Export Administration Regulations. Diversion contrary to U.S. law prohibited." Raytheon Aircraft Company (RAC) issues Service Information for the benefit of owners and fixed base operators in the form of two classes of Service Bulletins. The first class, Mandatory Service Bulletins (red border) includes changes, inspections and modifications that could affect safety or crashworthiness. RAC also issues Service Bulletins with no red border which are designated as either recommended or optional in the compliance section within the bulletin. In the case of recommended Service Bulletins, RAC feels the changes, modifications, improvements or inspections will benefit the owner/operator and although highly recommended, Recommended Service Bulletins are not considered mandatory at the time of issuance. In the case of Optional Service Bulletins, compliance with the changes, modifications, improvements or inspections is at the owner/operator’s discretion. Both classes are mailed to: (a) RAC Authorized Service Centers. (b) Owners of record on the FAA Aircraft Registration Branch List and the RAC International Owner Notification/Registration Service List. (c) Those having a publications subscription. Information on Owner Notification Service or subscription can be obtained through any RAC Authorized Service Center. As Mandatory Service Bulletins and Service Bulletins are issued, temporary notification in the Service Bulletin Master Index should be made until the index is revised. Warranty will be allowed only when specifically defined in the Service Bulletin and in accordance with the RAC Warranty Policy. Unless otherwise designated, RAC Mandatory Service Bulletins, Service Bulletins and RAC Kits are approved for installation on RAC airplanes in original or RAC modified configurations only. RAC Mandatory Service Bulletins, Service Bulletins and Kits may not be compatible with airplanes modified by STC installations or modifications other than RAC approved kits. MANDATORY SB 52-2693, Rev. 2Recurring Inspection Beech TITLE: DOORS - INSPECTION OF THE INTERIOR DOOR HANDLES SYNOPSIS OF CHANGE This service bulletin has been revised to reflect changes in the Reason, Compliance Statement and the Accomplishment Instructions. Relevant technical changes are marked with change bars in the outside margins. 1. Planning Information A. Effectivity (1) Airplanes (a) Civil BEECH Debonair Models 35-33, 35-A33, 35-B33, 35-C33, 35-C33A, all serials; Bonanza Models E33, F33, G33, E33A, F33A, E33C, and F33C, all serials; Bonanza Models C35, D35, E35, F35, G35, H35, J35, K35, M35, N35, P35, S35, V35, V35A, V35B, V35TC, V35ATC, and V35BTC, all serials; Bonanza Models 36, A36, A36TC, and B36TC, all serials; Twin Bonanza Models 50, B50, and C50, all serials; Baron Models 56TC and A56TC, all serials; Baron Model 58TC, all serials; Travel Air Models 95, B95, B95A, D95A and E95, all serials. (b) Military Models L23A and L23B, all serials; Model 95B55B, all serials. If you are no longer in possession of the airplane, please forward this information to the present owner. (2) Spares None. SERVICE BULLETIN SB 52-2693, Rev. 2 2 of 6 MANDATORY Issued: May, 2000 Revised: January, 2002 B. Reason This Service Bulletin is being issued to inspect both the interior cabin door handle and the interior utility door handle for proper installation. An investigation into a report that the utility door opened without having to depress the handle lock release button has revealed that if the door handle is not properly oriented during installation, the handle lock mechanism does not restrict inadvertent unlatching of the door. C. Description This Service Bulletin provides instructions to inspect the cabin door and utility door (if installed) for proper latching and handle operation. If either door is operating incorrectly, instructions to reorient the door handle and install a new handle (if necessary) are provided. D. Compliance (1) Civil Airplanes Raytheon Aircraft Company considers this to be a mandatory modification and it must be accomplished prior to next flight and any time either the cabin or the utility interior door handle is removed. The inspection portion may be accomplished by a certified pilot. Additionally, this inspection must be verified at the next annual or 100 hour inspection by an appropriately rated aircraft mechanic. If the inspection discloses that the interior door handle is not operating properly, take the airplane to the nearest appropriate service center for repairs. Airworthiness Directive 97-14-15 has been issued to cover the original issue of this Service Bulletin. A revision to Airworthiness Directive 97-14-15 has been requested. (2) Military Airplanes For compliance information on military airplanes affected by this Service Bulletin, contact the appropriate headquarters. E. Approval The engineering data contained in this Service Bulletin is FAA approved. F. Manpower The following information is for planning purposes only: Estimated man-hours: 0.5 hours. Estimated man-hours for removal/orientation: 1 hour Suggested number of men: 1 man. The above is an estimate based on experienced, properly equipped personnel complying with this Service Bulletin. Occasionally, after work has started, conditions may be found which could result in additional man- hours. G. Weight and Balance None. SERVICE BULLETIN 3 of 6 MANDATORY SB 52-2693, Rev. 2Issued: May, 2000 Revised: January, 2002 H. Electrical Load Data Not changed. I. Software Accomplishment Summary Not applicable. J. References None. K. Publications Affected It is recommended that a note “See Service Bulletin No. 52-2693 Rev. 2" be made in Chapter 52 of the applicable airplane maintenance manual. L. Interchangeability of Parts Not applicable.
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M. Warranty Credit None. 2. Material Information None 3. Accomplishment Instructions This Service Bulletin shall be accomplished as follows: NOTE Should any difficulty be encountered in accomplishing this Service Bulletin, contact Raytheon Aircraft Company at 1-800-429-5372 or 316-676-3140 for commercial aircraft, and appropriate headquarters for military aircraft. A. Airplane Observe all Warnings and Cautions contained in the aircraft manuals referred to in this Service Bulletin. Whenever any part of this system is dismantled, adjusted, repaired or renewed, detailed investigation must be made on completion to make sure SERVICE BULLETIN SB 52-2693, Rev. 2 4 of 6 MANDATORY Issued: May, 2000 Revised: January, 2002 that distortion, tools, rags or any other loose articles or foreign matter that could impede the free movement and safe operation of the system are not present, and that the systems and installations in the work area are clean. Inspection of both the interior cabin door and the utility door interior handles must be accomplished in order to fully comply with the Service Bulletin. Review the Service Bulletin in its entirety before performing any inspection or maintenance to the cabin and utility door interior handles. INSPECTION OF THE INTERIOR CABIN DOOR AND THE UTILITY DOOR INTERIOR HANDLES (1) Close and latch the cabin door. Rotation of the interior door handle without depressing the handle lock release button should not result in unlatching of the door. (2) Rotate the interior cabin door handle clockwise without depressing the handle lock release button. (a) If the door handle remains latched, no additional work is required for the cabin door handle. (b) If the door becomes unlatched, proceed to step 3. (3) Examine the handle lock release button for proper operation. NOTE Depressing the handle lock release button should permit the handle to travel beyond the step in the base plate. When the handle lock release button is not depressed, the step should restrict handle travel to the open position. (a) If the interior door handle is in good operating condition, perform the REMOVAL/ORIENTATION OF THE INTERIOR DOOR HANDLE procedure provided in this Service Bulletin. (b) If the handle lock release button is not operating properly, perform the REMOVAL/ORIENTATION OF THE INTERIOR DOOR HANDLE procedure using a new handle. INSPECTION OF THE INTERIOR UTILITY DOOR HANDLE (1) Close and latch the utility door. Rotation of the interior door handle without depressing the handle lock release button should not result in unlatching of the door. (2) Rotate the interior utility door handle clockwise without depressing the handle lock release button. (a) If the door remains latched, no additional work is required for the utility door handle. (b) If the door becomes unlatched, proceed to step 3. SERVICE BULLETIN 5 of 6 MANDATORY SB 52-2693, Rev. 2Issued: May, 2000 Revised: January, 2002 (3) Examine the handle lock release button for proper operation. NOTE Depressing the handle lock release button should permit the handle to travel beyond the step in the base plate. When the handle lock release button is not depressed, the step should restrict handle travel to the open position. (a) If the interior door handle is in good operating condition, perform the REMOVAL/ORIENTATION OF THE INTERIOR DOOR HANDLE PROCEDURE provided in this Service Bulletin. (b) If the handle lock release button is not operating properly, perform the REMOVAL/ORIENTATION OF THE INTERIOR DOOR HANDLE procedure using a new handle. REMOVAL/ORIENTATION OF THE INTERIOR DOOR AND THE UTILITY DOOR INTERIOR HANDLES NOTE It may be necessary to place the door handle in the unlatched position to access both screws used to secure the door handle. (1) Prior to removal of either interior door handles, with the handles in the open position, place a strip of masking tape next to the short end of the handle to easily indicate the correct orientation of the handle for installation. (2) Remove the two screws which secure the interior door handle base plate. (3) Slide the interior door handle from the shaft, maintaining the same orientation of the door handle with respect to the shaft. (4) Rotate the door handle 90°°°° clockwise, maintaining the base plate in the same position. Figure 1 illustrates the incorrect installation and correct installation of the interior door handles. (Note: Handle configuration of some airplanes may differ from what is shown in Figure 1). (5) Slide the interior door handle over the shaft and secure, using the screws removed in step (2). Check the short end handle to ensure it is aligned with the tape. (6) Latch the door by rotating the interior door handle counterclockwise. Rotation of the interior door handle without depressing the handle lock release button should not result in unlatching of the door. (7) Rotate the interior door handle clockwise without depressing the handle lock release button. If the door remains latched, proceed to step (8). If the door becomes unlatched, repeat steps 1 through 6. (8) With the door latched, depress the handle lock release button while rotating the handle clockwise. Rotating the door handle clockwise while depressing the handle lock release button should unlatch the door. B. Spares Not applicable. C. Record of Compliance Upon completion of this Service Bulletin, the certified pilot should make an entry in the airplane log book reflecting satisfactory accomplishment of the inspection portion of this Service Bulletin. If the results of the inspection are not satisfactory, the mechanic should make an appropriate airframe log book entry reflecting repair. SERVICE BULLETIN SB 52-2693, Rev. 2 6 of 6 MANDATORY Issued: May, 2000 Revised: January, 2002 Installation of the Interior Door Handles (Crew Door and Utility Door) Figure 1 B269301.AI B A DETAIL A DETAIL B STEP STEP BASE PLATE FWD FREE-PLAY * FREE-PLAY * * FREE-PLAY TRAVEL OF THE UTILITY DOOR HANDLE WHEN IN LATCHED POSITION AFT UP UP AFT DOOR EDGE AFT DOOR EDGE CORRECT INSTALLATION CORRECT INSTALLATION INCORRECT INSTALLATION INCORRECT INSTALLATION FWD FORWARD DOOR EDGE FORWARD DOOR EDGE UP UP FWD STEP STEP BASE PLATE FREE-PLAY * FREE-PLAY * * FREE-PLAY TRAVEL OF THE COPILOT'S DOOR HANDLE WHEN IN LATCHED POSITION