AD 97-17-04R1 Airworthiness Directives; Pratt & Whitney JT8D-209, -217, -217C, and -219 Turbofan Engines

This AD applies to Pratt & Whitney (PW) JT8D-209, -217, -217C, and -219 turbofan engines with front compressor front hub (fan hub), part number (P/N) 5000501-01, installed. These engines are installed on, but not limited to, McDonnell Douglas MD-80 series airplanes.

You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. (f) Inspect fan hubs for cracks in accordance with the Accomplishment Instructions, Paragraph A, Part 1, and, if applicable, Paragraph B, of PW Alert Service Bulletin (ASB) No. A6272, dated September 24, 1996, as follows: (1) For fan hubs identified by serial numbers (S/Ns) in Table 2 of this AD, after the fan hub has accumulated more than 4,000 cycles-since-new (CSN), as follows: (i) Initially inspect within 315 cycles-in-service (CIS) from the effective date of this AD, or 4,315 CSN, whichever occurs later. (ii) Thereafter, re-inspect after accumulating 2,500 CIS since last inspection, but not to exceed 10,000 CIS since last inspection. (2) For fan hubs identified by S/Ns in Appendix A of PW ASB No. A6272, dated September 24, 1996, after the fan hub has accumulated more than 4,000 CSN, as follows: (i) Select an initial inspection interval from Table 1 of this AD, and inspect accordingly. Table 1—Inspections Initial inspection Re-inspection (A) Within 1,050 CIS after the effective date of AD 97-02-11, March 5, 1997, or prior to accumulating 5,050 CSN, whichever occurs later; After accumulating 2,500 CIS since-last-inspection, but not to exceed 6,000 CIS since-last-inspection. OR OR (B) Within 990 CIS after the effective date of AD 97-02-11, March 5, 1997, or prior to accumulating 4,990 CSN, whichever occurs later; After accumulating 2,500 CIS since-last-inspection, but not to exceed 8,000 CIS since-last-inspection. OR OR (C) Within 965 CIS after the effective date of AD 97-02-11, March 5, 1997, or prior to accumulating 4,965 CSN, whichever occurs later. After accumulating 2,500 CIS since-last-inspection, but not to exceed 10,000 CIS since-last-inspection. Table 2—Hubs With Traveler Notations               M67663 M67802 P66880 S25545 P66747 R33099 S25292 M67671 M67812 P66885 S25558 P66756 R33107 S25299 M67675 M67826 R32732 S25564 P66800 R33113 S25301 M67681 M67829 R32733 S25598 P66814 R33124 S25302 M67685 M67830 R32735 S25618 P66819 R33131 S25308 M67686 M67831 R32740 S25621 P66831 R33132 S25312 M67687 M67832 R32741 S25637 R32767 R33133 S25316 M67697 M67834 R32810 S25640 R32787 R33136 S25323 M67700 M67843 R32849 T50693 R32792 R33152 S25334 M67706 M67849 R32850 T50752 R32795 R33157 S25335 M67710 M67858 S25222 T50785 R32796 R33163 S25337 M67712 M67866 S25464 T50791 R32800 R33165 S25344 M67713 M67868 S25481 T50792 R32807 R33168 S25369 M67714 M67869 S25483 T50819 R32856 R33171 S25377 M67715 M67872 S25484 T50823 R32860 R33173 S25378 M67716 M67888 S25486 T50827 R32870 R33180 S25381 M67717 N71771 S25488 T50874 R32883 R33181 S25394 M67722 N71804 S25489 T50875 R32905 R33189 S25399 M67723 N71806 S25490 T51058 R32926 R33194 S25402 M67725 N71810 S25491 T51104 R32930 R33198 S25406 M67726 N71811 S25492   R32952 R33201 S25411 M67730 N71875 S25494   R32964 R33202 S25413 M67731 N71876 S25495   R32966 R33207 S25414 M67746 N71921 S25497   R32971 S25193 S25415 M67751 N71965 S25498   R32976 S25195 S25418 M67753 N72062 S25499   R32981 S25207 S25419 M67764 N72126 S25500   R32990 S25208 S25421 M67765 N72152 S25501   R32994 S25221 S25422 M67784 N72162 S25502   R33000 S25229 S25430 M67791 N72207 S25505   R33004 S25238 S25437 M67792 N72216 S25506   R33040 S25246 S25439 M67793 N72219 S25507   R33055 S25248 S25449 M67794 N72242 S25508   R33059 S25250 R33186 M67795 P66693 S25509   R33077 S25256 S25528 M67796 P66695 S25514   R33080 S25262   M67797 P66696 S25529   R33082 S25268   M67798 P66698 S25532   R33086 S25278   M67799 P66699 S25541   R33087 S25287   M67800 P66737 S25543   R33089 S25288   M67801 P66753 S25544   R33090     (ii) Thereafter, re-inspect at intervals that correspond to the selected inspection interval. (3) If a fan hub is identified in both Table 2 of this AD and Appendix A of PW ASB No. A6272, dated September 24, 1996, inspect in accordance with paragraph (f)(1) or (f)(2) of this AD, whichever occurs first. (4) For fan hubs with S/Ns not listed in Table 2 of this AD or in Appendix A of PW ASB No. A6272, dated September 24, 1996, after the fan hub has accumulated more than 4,000 CSN, inspect the next time the fan hub is in the shop at piece-part level, but not to exceed 10,000 CIS after March 5, 1997. (5) Prior to further flight, remove from service fan hubs found cracked or that exceed the bushed hole acceptance criteria described in PW ASB No. A6272, dated September 24, 1996. Reporting Requirements (g) Report findings of cracked fan hubs using Accomplishment Instructions, Paragraph F, of Attachment 1 to PW ASB No. A6272, dated September 24, 1996, within 48 hours to Kevin Dickert, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; telephone (781) 238-7117; fax (781) 238-7199; e-mail: kevin.dickert@faa.gov. (h) The Office of Management and Budget (OMB) has approved the reporting requirements and assigned OMB control number 2120-0056. Alternative Methods of

This AD results from the FAA determining that it has collected a sufficient amount of data since issuing AD 97-17-04 and that therefore, it no longer needs the monthly reporting of the number of completed inspections. We are issuing this AD to prevent fan hub failure due to tierod, counterweight, or bushed hole cracking, which could result in an uncontained engine failure and damage to the airplane.