In DC-10 SBs what does Group I thru IV indicate?
In DC-10 SBs what does Group I thru IV indicate?
(OP)
Howdy all,
I'm going through some DC-10 Service Bulletins (SBs) and in these SBs it referes to Group I, II, III and IV aircraft, but nowhere does it indicated what these groups are. Are they DC-10-10, -30, -40 and KC-10? Could someone point me to a reference where I can read it and say "Aha! that's what they mean." Specifically I'm revewing SB's that effect the upper forward rudder, 55-11, 55-15, and 55-21.
Thanks,
-Kirby
I'm going through some DC-10 Service Bulletins (SBs) and in these SBs it referes to Group I, II, III and IV aircraft, but nowhere does it indicated what these groups are. Are they DC-10-10, -30, -40 and KC-10? Could someone point me to a reference where I can read it and say "Aha! that's what they mean." Specifically I'm revewing SB's that effect the upper forward rudder, 55-11, 55-15, and 55-21.
Thanks,
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.





RE: In DC-10 SBs what does Group I thru IV indicate?
RE: In DC-10 SBs what does Group I thru IV indicate?
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.
RE: In DC-10 SBs what does Group I thru IV indicate?
With LRU's, the S/B may reference a Component Manual Manual (CMM) to follow for the modification as the S/B will state for example to remove a -1 component and install a modified -2.
RE: In DC-10 SBs what does Group I thru IV indicate?
I'm working the same issue with S/B 55-21. However, after identifying the effectivity, now the question is the intent of the S/B group I vs. group II. Particularly for this S/B, is the intent to first remove the upper rudder or not? Changing the weights with rudder installed seems risky and the S/B does not clearly state on or off. Do you have experience with this?
RE: In DC-10 SBs what does Group I thru IV indicate?
By the way I tried following the progression of parts through the three service bulletins (55-11, 55-15 and 55-21) and got confused. Were you able to make sense of the SB's P/N changes? I'm still not sure if I want the Tungsten weight with the aluminum shield because the previous weight had the aluminum shield as it reccomends in the SB or just got for the Tungsten weight without the shield since the tungsten doesn't need it like the DU weight did.
-Kirby
Kirby Wilkerson
Remember, first define the problem, then solve it.
RE: In DC-10 SBs what does Group I thru IV indicate?
It appears to be your choice (shielded or unshielded) except for the parts listed on pg. 45.
The grouping for 55-21 is confusing. I find A/C effectivity, man hours, and two methods.
• Group I: upper, mid-span
• Group II: both upper and mid-span
• Group I man hours
• Group II man hours
Hope this helps.