Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
A Checks, C Checks, M Checks, Etc  
User currently offlineMTChemNerd757 From United States of America, joined Feb 2004, 230 posts, RR: 2
Posted (12 years 3 months 1 day 1 hour ago) and read 2289 times:

Hi, as i look through the forums, i see messages about c checks and a checks and m checks (are the 3 that come to mind). can someone fill me in as to what each of these is and what they entail? thanks!


Fight Terrorism - Ride a Bike!
6 replies: All unread, jump to last
User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 1, posted (12 years 3 months 20 hours ago) and read 2173 times:

Every airline has its only schedule of maintenance (approved by the manufacturer and the aplicable government body).

Here, since we have such a varied fleet, we also have different maintenance programs.


Arrival Service checks whenever the aircraft arrives at a station with maintenance.

Periodic Service check every weekend, not to exceed 7 days.

Then, depending on fleet type, we will do either "A-Checks", "PS-Checks", "PMC-Checks" or "TC-Checks." These are scheduled at intervals set out in our Maintenance Specification Manuals. basically the above checks involve lubrication, servicing, inspecting and checking systems at a superficial level.

Then we get into your heavier checks, "B", "C" & "D". These are progressively higher checks. As a guideline, "B" is done at 3 or 4 month intervals, "C" at 2 or 3 year intervals and "D" at 4-6 year intervals. I'm not sure if anyone does "D" checks anymore, since You can roll "D" check tasks into "C" checks. '

If you haven't noticed it is complicated and varied.

By the way, never heard of an "M" check.

Clear as mud.

User currently offlineMTChemNerd757 From United States of America, joined Feb 2004, 230 posts, RR: 2
Reply 2, posted (12 years 3 months 12 hours ago) and read 2083 times:

thanks air2gxs. what kinds of things would be examples of what you would check every 3 months versus every 3 years?

Fight Terrorism - Ride a Bike!
User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 3, posted (12 years 3 months 12 hours ago) and read 2074 times:

An example that comes to mind is starter oils. Some more are CSD/IDG filters & oil, magnetic chip detectors, hydraukic system filters, airconditioning filters. Basically normal wear & tear items.

at c check you begin to look at structural components and items that may still be hard-timed, i.e. gear, flight controls, etc.

User currently offlineFlightSimFreak From United States of America, joined Oct 2000, 720 posts, RR: 0
Reply 4, posted (12 years 3 months 8 hours ago) and read 2044 times:

At UND, they do A, B, C, and D checks. A is fuselage and empenage, B is engine and cowl, C is wings, and D is B all over again...

At least that's what I recall.

[Edited 2004-02-08 02:25:37]

User currently offlineNKP S2 From United States of America, joined Dec 1999, 1714 posts, RR: 5
Reply 5, posted (12 years 3 months 7 hours ago) and read 2039 times:

If nothing else, I hope the original poster of the question ( or anyone else who cares to know ) can see the just how varied they all are. The whole letter check philosophy is so broad and vague the only thing you can really state with relative certainty is that the checks get more involved and comprehensive upon one another.

Too too many variations. A-checks, B-checks, C-checks, Q-checks, K-checks, S-checks, D-checks.

Some places don't do a full D, but break it up into phases ( commensurate with specific hourly requirements in certain areas ). Never did see a basic "C" check in all my travels...C-1, C-2, C-3.....C-11. Same with B's and A's. I've seen where one carrier's "B" is more like another carrier's "A" and vise-versa and everywhere in between.

You can see, that the basic question is like asking "How long is a piece of string?".

While the forum search ( IMHO ) leaves something to be desired, there is a TON of info on this very subject, and the reader can be kept busy for hours reading it. Note to moderators: How about a Tech-Ops FAQ using info from the archives?

User currently offlineMTChemNerd757 From United States of America, joined Feb 2004, 230 posts, RR: 2
Reply 6, posted (12 years 2 months 4 weeks 1 day 23 hours ago) and read 2006 times:

thanks everybody! gives me at least a general idea.  Smile

Fight Terrorism - Ride a Bike!
Top Of Page
Forum Index

Reply To This Topic A Checks, C Checks, M Checks, Etc
No username? Sign up now!

Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)

Similar topics:More similar topics...
Air Tahiti Nui A340 C-Checks posted Fri Oct 27 2006 03:41:34 by Corsair2
A, B, C, D Checks On 3rd World Airlines. posted Sat Jul 1 2006 11:34:38 by Jafa39
FIM & Transit Checks. posted Fri Jun 2 2006 12:02:55 by HAWK21M
Medical Checks - Mx Personnel. posted Fri Apr 14 2006 10:58:53 by HAWK21M
New EU Aviation Law / Security Checks posted Tue Dec 20 2005 03:10:32 by Starline
Maintenance Checks Deciphered? posted Mon Dec 5 2005 17:47:35 by DeltaGator
A320 Series Up For FAA Checks Following JetBlue posted Fri Nov 25 2005 14:07:43 by Julesmusician
Visual Checks On Aircraft In Quick Turnarounds posted Sat Oct 29 2005 01:14:41 by Julesmusician
C And D Checks posted Wed Aug 24 2005 19:23:18 by Amirs
How Are Planes Tested After Maintenance Checks? posted Sun Aug 21 2005 00:06:26 by Comorin

Sponsor Message:
Printer friendly format