MAINTENANCE ADVISORY ON SAFETY OF USE MESSAGES

File: 061496_jun_decls5_0005.txt
Page: 0005
Total Pages: 13

Subject: MAINTENANCE ADVISORY ON SAFETY OF USE MESSAGES                  

Box ID: BX001440

Unit: 24TH ID     

Parent  Organization: XVIII CORPS 

Folder Title: 24 IN DIV PROCEDURES                                                                            

Folder Seq #:        171

Document Number:          7

Document Date: 

Scan Date: 04-JUN-1996












            R 30150OZ NOV 90
            FM CDR AMCCOM ROCK ISLAND IL//AMSMC-QAS//
            TO AIG 9874
                AIG 7481


            SUBJECT: AMMUNITION    INFORMATION NOTICE (AIN) 13-91;
            PRECAUTION TO PREVENT BUILDUP OF PROPELLANT RETAINING CLIPS
            DURING FIRING OF 4.2 INCH MORTARS.
            A.  TM 9-1015-215-10, OPERATOR'S MANUAL FOR 4.2 INCH MORTAR,.
            M30.


            1.  AIN 12-91 WAS XMITTED ON 30143OZ NOV-90.


            2.  THIS SUPERSEDES AIN 21-90.


            3.  REQUEST QASAS ORG ASSURE THIS INFORMATION IS PASSED TO
            ALL POTENTIAL USERS WITHIN THEIR AREA OF SUPPORT.

            4.  PROPELLANT RETAINING CLIPS ARE KNOWN TO FALL OFF DURING
            FIRING OF 4.2 INCH MORTAR CTGS. PRECAUTIONS ARE TO BE TAKEN
            DURING FIRING TO PREVENT BUILDUP OF CLIPS IN BASE OF TUBE AND
            TO REDUCE POTENTIAL FOR MISFIRES. FOL CAUTIONS WILL BE ADDED
            TO REF AND ARE TO  BE IMPLEMENTED IMMEDIATELY:

                A. CAUTION:    BOTTOM OF TUBE IS TO BE CHECKED (VISUALLY)
                               APPROX EVERY 40 ROUNDS. IF MORE THAN FIVE
                               PROPELLANT HOLDING CLIP WIRES ARE LYING IN
                               THE TUBE, THEY SHOULD BE REMOVED BY DUMPING
                               TUBE.


                B. CAUTION:    TO PREVENT A POSSIBLE MISFIRE, ASSURE PRIOR
                               TO FIRING, THAT PROPELLANT HOLDING CLIPS
                               ARE SEATED IN GROOVES PROVIDED ON THE
                               IGNITION CTG CONTAINER OR EXTENSION. SEE
                               PAGES 4-46 AND 4-47 FOR ILLUSTRATION.


            5. TESTING HAS INDICATED THAT SOME PROPELLANT HOLDING CLIP
            WIRES WILL FALL OFF EVEN IF PROPERLY SEATED IN THE GROOVES
            PROVIDED ON THE CTG CONTAINER AND EXTENSION. TESTING
            INDICATED THAT BUILDUP SUFFICIENT TO CAUSE MISFIRES COULD
            OCCUR AFTER AS LITTLE AS 40 ROUNDS BEING FIRED.

         6. POC IS @IR. OWEN WASMOEN, AMSMC-QAS-C, DSN 793-7571 OR
            COMMERCIAL (309) 782-7571.


            7. THIS AIN EXPIRES 30 NO%' 91 UNLESS OTHERWISE RESCINDED OR
            SUPERSEDED.

Document 13 f:/Week-22/BX001440/24 IN DIV PROCEDURES/maintenance advisory on safety of use messages:0614961651115
Control Fields 17
File Room = jun96_declassified
File Cabinet = Week-22
Box ID = BX001440
Unit = 24TH ID
Parent Organization = XVIII CORPS
Folder Title = 24 IN DIV PROCEDURES
Folder Seq # = 171
Subject = MAINTENANCE ADVISORY ON SAFETY OF USE MESSAGES
Document Seq # = 5
Document Date =
Scan Date = 14-JUN-1996
Queued for Declassification = 01-JAN-1980
Short Term Referral = 01-JAN-1980
Long Term Referral = 01-JAN-1980
Permanent Referral = 01-JAN-1980
Non-Health Related Document = 01-JAN-1980
Declassified = 14-JUN-1996