MIL-A-008865 vs MIL-A-8865B 1

[alexeu]

Does anyone knows if MIL-A-8865B is the superseding document for MIL-A-008865? There are no history for MIL-A-008865 except that it is cancelled with no replacement. Anyone out there have a copy of MIL-A-008865?

Thank you

Regards
aeu

 

[rb1957]

http://assist1.daps.dla.mil/quicksearch/

...
search for document # 8865, you can download the pdf

 

[alexeu]

Thanks rb1957, I have a copy of MIL-A-8865B but not MIL-A-008865. The reason for this verification is because the load factors for the litter installation for the MIL-A-008865 is supposedly greater than those specified in MIL-A-8865B. I currently do not have documentation to prove this because all I have is an extract from a Company's Published manual.

MIL-A-8865 MIL-A-008865
FWD 8G 20G
AFT 8G 10G
Lateral 1.5G 10G
Up 2G 10G
Down 4.5G 20G

I am not convinced that MIL-A-8865B supersedes MIL-A-008865 because the face sheet of MIL-A-8865 does not indicate that it does supersedes the requirements in MIL-A-008865.

Any ideas where to get a copy of MIL-A-008865 which has been cancelled? Or is it relevant anymore?

 

[rb1957]

i really think that 008865 is the same as 8865.

the inertia factors you've quoted for 008865 are in 8865B under seats (table 1) rather than litters (para 3.2.2).

maybe the original installation used these higher factors to be conservative ?

 

[MNLiaison]

alexeu,

Original issue of MIl-A-008865A cover page upper corner reads:

USED IN LIEU OF MIL-A-8865 (ASG).

Cancellation page of MIL-A-008865A reads;

FOR FUTURE PROCUREMENT, SEE MIL-A-87221.

Continuing on, MIL-A-87221 has been cancelled and reads;

FUTURE AQUISITIONS SHOULD REFER TO AFGS-87221A.


Regards,
mnliaison

 

[alexeu]

MNLiaison

Thanks for the valuable feedback. Do you have any idea how I can get a PDF copy of the AFGS-87221A document?

Thank you.

 

[rb1957]

the ASSIST web-site has this doc (search for 87221). Apparently this is superceded by JSSG-2006, which is also on the website (as a downloadable pdf).

i've searched this for "litter" loads, as this is what i think you're interested in. the result is on pg289 with inertia factors as per 8865B (as you've quoted above).

 

[WKTaylor]

alexeu

MIL-A-8865 [1960]
3.2.2 Litter installation loads. For litter installations, the following load factors acting separately shall apply to a 25O-pound litter load:
Longitudinal: 8.0 forward
Lateral: 1.5 to right and to left
Vertical 4.5 down and 2.0 up

MIL-A-8865A [1971]
3.3.3 Litter installation loads. For litter installations, the following load factors acting separately shall apply to a 25O-pound litter load:
Longitudinal: 9.0 forward and 1.5 Aft
Lateral: 1.5 to right and to left
Vertical 4.5 down and 2.0 up

MIL-A-8865B [1983]
3.2.2 Litter installation loads. For litter installations, the following load factors acting separately shall apply to a 25O-pound litter load:
Longitudinal: 8.0 forward
Lateral: 1.5 to right and to left
Vertical 4.5 down and 2.0 up

FAA AC135-15 EMS Aircraft [AC135-14 EMS Helos]
Chapter 1 Para 1…
b. Additional Equipment/General. The applicant should identify in their initial application, any specialized equipment that may be used in EMS operations. The equipment should be installed in the aircraft in an acceptable method (using data approved by the aircraft manufacturer, an EMS equipment manufacturer, or the FAA Administrator). The FAA may approve add-on equipment installation after evidence of airborne test results are submitted from the aircraft operator, the Department of Transportation (DOT), Department of Defense, or an independent testing organization. Any equipment installed aboard the aircraft should comply with the data in AC 43.13-2A, Chapter 1, paragraph 2(d) and 3, and Chapter 12, paragraph 243(a), and withstand the following static loads in accordance with AC 43.13-1A:
(1) 9.O-G forward, 6.6-G downward, and 3.O-G upward, and 1.5-G sideward; and
(2) tie-down, 13.5-G forward, 9.9-G downward, 4.5-G upward, 2.25-G sideward.


Regards, Wil Taylor