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TOPIC: Wing Spar Inspection

Wing Spar Inspection 1 week 2 days ago #1598

Thanks for the information.
Carlos
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Wing Spar Inspection 1 week 3 days ago #1593

  • STEVE ELLS
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Carlos, the bulletin that applies to your 421B is 57-01; 57-02 applies to the 402C, 414A and 421C. As the bulletin says, your initial inspection time is within 50 hours of 12,000 hours airframe time. Then the inspection interval (visual with strong light and 10X magnifying glass) is every 50 hours.
You will need to cut an inspection panel in the lower wing skin when you reach 12,000 hours.
The inspection is to detect cracks in the lower fuselage stub wing carry-through section, at the lower main spar wing attach area.
I hope this answers your question and clears up any confusion.
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Wing Spar Inspection 1 week 6 days ago #1589

We have a Cessna 421B, and we had reviewed AD2018-03-03 R1, as well as spoken with AD contact Ms Bobbie Kroetch, the engineer associated with the AD. She stated that according to the AD, the Cessna 421B was not due for an initial wing spar cap inspection until 12,000 airframe hours. Today we received an "Owner Advisory" labeled MEL-57-02 which seems to show that the 421B must be inspected if the TTAF is 5,500 to 15,999 hours. Has the AD been changed? Does anybody know which is the correct inspection time? Reference is made to SID 57-10-14 as it applies to the 421B, but the AD states that the correct 421B SID is 57-10-10. I called Cessna to see which is correct, and they did not have records of any such SID's! The whole thing is pretty confusing. Any answers?/suggestions?
Thanks
Carlos
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