1、MIL-T-81838 (AS) AMENDMENT .- 1. 8 March 1976 -. MILITARY SPECIFICATION . TANK, FUEL, AIRCRAFT, AUXILIARY EXTERNAL 300 GALLON, TYPE AERO-U) This amendment forms a part of Military Specification MIL-T-81838(AS), dated 30 November 1971, ,and has been approved by the Naval Air Systems Command, Departme
2、nt of the Navy. Page 3 / Paragraph 2.1, add new specification “MIL-V-81356, Valve, Fuel System Pressurization and Vent. Page 4 Paragraph 3.1.1.1, add new paragraph “Camouflage Tanks - When specified camouflage tanks shall be painted such that the final exterior color and camouflage paint scheme shal
3、l consist of applying Federal Standard 595A-1 color 34079, green,-to the top half of the tank and color 36622, grey, to the bottom half. sinsuoidal pattern. The area of overlap shall be six (6) inches above and below the horizontal centerline. Thebackground color for decals located on the top half o
4、f the camouflage tank shall be in accordance with Federal Standard 595, color 34087.“ The colors shall be overlapped in an irregualr Page 6 Paragraph 3.13.1, add new paragraph “Vent Shut-Off Valve - The vent shut-off valve shall be in accordance with MIT-V-81356 and shall pro- hibit fuel from being
5、vented while the tank is accelerated in the forward direction.“ I Page 8 Paragraph 4.4.2, line 26, add to last sentence “The following exception shall be permitted for lot sizes requiring three samples to be selected. The three samples may be selected utilizing the following schedule: O-40% tank fab
6、ricated in the lot (1 sample) 41-80% tank fabricated in the lot (1 sample) 81-100% tank fabricated .in the lot (i sample) (1) All tanks in the lot shall be fabricated within a period not to exceed one month. None of the tanks in the lot may be shipped until all three samples have satisfactorily pass
7、ed the lot sample tests. The,rhird lot sample must be selected after the final t&lc in the lot has been fabricated.“ (2) /, (3) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-._I_I. _ . NIL-T-BIIB3B (II) 15 W 7777706 0205207 O M Page 9 - Paragraph 4
8、6.1.3, Delete entire paragraph and substitute “Finish Hard- ness - Two (2) test panels each day of paint operation shall be tested in accordance with Federal Standard 141 Method 6212. The finish shall not be marred by the test. of the production tank material, paint, and paint procedures.“ The pane
9、ls shall be fully representative Page 9 Paragraph 4.6.1.6, line 3, delete “This examination shall be made after the functional tests.“ Page 12 Paragraph 4.6.2.3.4, delete “1 psi“ and substitute “2 psi“. Page 13 Paragraph 4.6.2.4.3.1, delete entire paragraph and substitute “With the tank full of fuel
10、 and the MD-2 tester connected as in paragraph 4.6.2.7.2.2 read the fuel capacitance C, of the probe. Compare the valve of Cc as obtained with the ing fonnula: - cf - Where : MD-2 tester to the-Cf valve as calculated by theLfollow- dry empty capacitance mmf . = effective capacitance mmf (furnished p
11、robe manufacturer) K = dielectric constant of test fluid Compare the measured valve of Cf as obtained with the M-2 tester to the Cf valve calculated by tester shall be within - 1.5% of the calculated Cf.“ he formula above. Cf obtained with the MD-2 r Page 15 Paragraph 4.6.3, line 7, add after last s
12、entence “All pressure tests at the higher levels (above 15 psig) shall be run with either JP-5 fuel containing a red dye,. or water containing a red dye.“ Project No. 1560-NO63 Q U.S. GOVERNMENT PRINTING OFFICE: 1976-603-766/3877 J Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
