AD 90-21-19

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AD Number:
90-21-19
Document Type:
AD Final Rules
Docket Number:
90-NM-195-AD
Subject Heading:
Airworthiness Directives; BOEING Model 727 and 727-100 Series Airplanes
Subject:
Main Deck Cargo Door Inspection
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
10/29/1990
Make:
The Boeing Company
Model:
727-100 Series | 727-100C Series | 727 Series | 727C Series
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Superseded AD: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Superseded By: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: 90-21-19
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   90-NM-195-AD

AMENDMENT:   39-6765

AD NUMBER:   90-21-19

SUBJECT HEADING:   Airworthiness Directives; BOEING Model 727 and 727-100 Series Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective October 29, 1990.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
90-21-19 BOEING: Amendment 39-6765. Docket No. 90-NM-195-AD.

Applicability: Model 727 and 727-100 series airplanes, equipped with main deck cargo doors installed in accordance with Supplemental Type Certificate (STC) SA1368SO, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.
To prevent inadvertent in-flight opening of the main deck cargo door, accomplish the following:
A. Within 5 days after the effective date of this AD, perform a visual inspection of the main deck cargo door to determine the number of cargo door latch lockpins installed. If 7 latch lockpins are installed, no further action is required.

B. If fewer than 7 latch lockpins are installed, within 10 days after the effective date of this AD, accomplish the following:

1. Install a warning placard in a prominent place in the cockpit stating: "Main Deck Cargo Door Latch Locks Missing - See AFM Limitations Section for Instructions."

2. Incorporate the following into the Limitations Section of the FAA-approved Airplane Flight Manual (AFM). This may be accomplished by inserting a copy of this AD in the AFM.

a. Prior to takeoff after operation of the main cargo door: From outside the airplane, verify that the door in the closed position is flush with the fuselage and that the torque tube position indicator is visible through the view port indicating that the torque tube has rotated to the latched position.

b. Prior to takeoff after operation of the main cargo door: From inside the airplane:

(1) Verify that all seven latches are engaged; that latch alignment marks, which indicate latch in overcenter position, are aligned; and that the lockpin in the forward latch position (Position No. l) is properly engaged.

(2) On the cargo door control panel, verify that all lights are extinguished, and that the door master power switch, if installed, is in the OFF position. If the master power switch is not installed, prior to each flight, pull the three cargo door hydraulic pump circuit breakers located on the P6-12B circuit breaker panel. These circuit breakers are to remain pulled during flight.

WARNING: Do not pull the cargo door control circuit breaker located on the P6-2 circuit breaker panel. This deactivates the cargo door warning annunciator system.

C. Within 10 days after the effective date of this AD, and thereafter at intervals not to exceed 30 days, accomplish the following:

1. Verify proper rigging of the door latches in accordance with the procedures specified in Section IV, page 8, of Aeronautical Engineers, Inc. (AEI), Service Bulletin Report No. R-690, dated August 22, 1990.

2. Perform a visual inspection of the cargo door warning annunciator system wiring, connectors, and switches for continued proper installation and continued integrity. If deficiencies are found, including broken or frayed wiring, repair prior to further flight.

3. Perform a functional inspection of the cargo door warning annunciator system, to verify that:

a. The "door closed," "latch lock," and "pin lock" limit switches (and corresponding lights on the door control panel) are functioning properly and in sequence; and

b. The cargo door warning light on the cargo door control panel and the cargo door warning light on the flight engineer's panel are illuminated when the main cargo door is open, and extinguished when the door is verified closed, latched, and locked.

4. With the cargo door properly rigged and in the closed, latched, and locked position, verify that the torque tube position indicator is properly indexed, and visible through the external view port.

D. Within 60 days after the effective date of this AD, install six cargo door latch locking mechanisms in accordance with AEI Service Bulletin Report No. R-690, dated August 22, 1990. Once this installation is accomplished, the repetitive inspections required by paragraph C. of this AD may be terminated, and the placard and AFM revision required by paragraph B. of this AD may be removed.

E. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Atlanta Aircraft Certification Office (ACO), ACE-130A, FAA, Central Region.

NOTE: The request should be submitted directly to the Manager, Atlanta ACO, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Atlanta ACO.

F. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to Aeronautical Engineers, Inc., P.O. Box 661027, Miami, Florida 33166. This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington, or at the FAA, Central Region, Atlanta Aircraft Certification Office, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia.

This amendment (39-6765, AD 90-21-19) becomes effective on October 29, 1990.

FOOTER: