Airworthiness directives › 2020-15-11
AD 2020-15-11 Airworthiness Directives; PZL Swidnik S.A. Helicopters
Applicability*9
This AD becomes effective August 11, 2020.
Compliance
(1) The Manager, Rotorcraft Standards Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Kristi Bradley, Aerospace Engineer, Safety Management Section, Rotorcraft Standards Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 817-222-5110; email 9-ASW-FTW-AMOC-Requests@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, the FAA suggests that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.
Required actions
The subject of this AD is addressed in European Aviation Safety Agency (now European Union Aviation Safety Agency) (EASA) AD No. 2018-0070, dated March 27, 2018. You may view the EASA AD on the internet at https://www.regulations.gov in Docket No. FAA-2020-0675.
Unsafe condition
For helicopters with a serial number (S/N) up to 37.10.12 inclusive, within 25 hours time-in-service (TIS) or 15 days, whichever occurs first; and for helicopters with an S/N above 37.10.12, within 300 hours TIS or 12 months after the date of manufacture, whichever occurs first: (1) Access the M/R vibration absorber by following Attachment 1, Procedure—Removal, Inspection, Repair, and Installation of Vibration Absorber Star, section II., of WYTWORNIA SPRZĘTU KOMUNIKACYJNEGO “PZL-Swidnik” Spolka Akcyjna Mandatory Bulletin No. BO-37-18-291, dated March 13, 2018 (MB BO-37-18-291 Attachment 1). (i) Clean the M/R vibration absorber star surface. Visually inspect the M/R vibration absorber star for paint coating delamination, blistering, discoloration, and missing paint coating, a scratch, a dent, a nick, and corrosion. (ii) If there is any paint coating delamination, blistering, or discoloration, or missing paint, any scratch, any dent, any nick, or corrosion, before further flight, mechanically remove any remaining paint coating and inspect the M/R vibration absorber star for a scratch, a dent, a nick, and corrosion. Additionally, inspect the heads of each bolt P/N 30.23.000.08.04 that secures the vibration absorber star to the bracket for corrosion under the bolt heads. Note 1 to paragraph (e)(1)(ii) of this AD: the anodic coating may become damaged while removing the paint coating. (A) If there is no scratch, dent, nick, or corrosion on the M/R vibration absorber star, before further flight, repair the paint coating. (B) If there is a scratch, a dent, a nick, or corrosion on the M/R vibration absorber star not exceeding the accumulated maximum total polishing depth of 0.5 mm, using 80-100 grit abrasive paper or an equivalent grit file or scraper, polish out any scratch, dent, nick, and corrosion and do the following: ( 1 ) Using 150-180 grit abrasive paper, blend the repaired surface and make a smooth chamfer as shown in Sketch 2. Blending Method, MB BO-37-18-291 Attachment 1. The blending width “S” must be at least 10 times greater than blending depth “h.” The radii “R1” and “R2” must be at least 5 times greater than depth “h.” ( 2 ) Using 600-900 grit abrasive paper, polish the repaired surface and repair the paint coating. (C) If there is a scratch, a dent, a nick, or corrosion on the M/R vibration absorber star that meets or exceeds the accumulated maximum total polishing depth of 0.5 mm, before further flight, remove from service the M/R vibration absorber star. (D) If there is corrosion on the head of any bolt P/N 30.23.000.08.04 that secures the vibration absorber star to the bracket, before further flight, repair or replace the M/R vibration absorber star in accordance with FAA approved procedures. (2) Thereafter, at intervals not to exceed 300 hours TIS or 1 year, whichever occurs first, perform the actions required by paragraph (e)(1) of this AD. (3) After the effective date of this AD, do not install an M/R vibration absorber star on any helicopter unless the requirements of paragraph (e)(1) of this AD have been accomplished.
Affected ADs
This AD defines the unsafe condition as corrosion pits in the M/R vibration absorber star. This condition could result in structural failure of the M/R vibration absorber star, damage to the main and tail rotor, and subsequent loss of control of the helicopter.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
- Bring your existing list in from a spreadsheet Paste the rows straight out of Excel. Headers like C/W Date and N/A are read for you.
- A copy that works when this does not One file. No internet, no login, no this software running. For the morning something has to be produced and the computer is not cooperating.
- $5 a month, or $50 a year Up to 50 aircraft on either.
Look round a real shop first Start free
The demonstration shop is eleven real aircraft with a year of work behind them. No account needed.
The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1