98-21-24: Compressor Disks

98-21-24 Pratt & Whitney: Amendment 39-10832. Docket 97-ANE-45-AD. Applicability: Pratt & Whitney (PW) JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, -17AR, -209, -217, -217A, -217C, and -219 model turbofan engines which have a compressor disk installed identified by part number and serial number in Table 1 of this airworthiness directive (AD). These engines are installed on but not limited to Boeing 727 and 737 series, and McDonnell Douglas DC-9 and MD80 series aircraft. Note 1: This AD applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (e) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent compressor disk cracking from arc burns in tie rod holes, shielding holes, or pressure balance holes, which could lead to a fracture of a compressor disk, resulting in uncontained release of engine fragments, inflight engine shutdown, and airframe damage, accomplish the following: (a) Within 3,000 cycles in service (CIS) after the effective date of this AD, or at the next shop visit, whichever occurs first, not to exceed 10 years after the effective date of this AD, remove, visually inspect, eddy current inspect, and repair or replace with a serviceable part disks identified by part number (P/N) and serial number (S/N) in Table 1 of this AD in accordance withGE Engine Services - Dallas, LP, Engineering Bulletin (EB) JT8D-025, dated March 27, 1998. TABLE 1 STAGE P/N S/N 3 745803 H13469, N48096, N48361, P77936, P77942, P78298, P98041, P98334, R18766, R18989, R19227,R73555, R74156 4 745704 2A3332, 2A4258, G51920, H04195, J46788, J76639, K11388, K11483, K12946, K52509, K53069, L60864, L61145 4 777704 B114AA0034, B114AA0178, B114AA0274, BBDUA14597, BBDUAH4675, BBDUAH7390, J77499, J94590, K43182, L81216, L81217, L81218, L81224, L81688, M40670, M44376, M44384, M53723, M53753, M53810, M53815, N30898, N30938, N30943, N30947, N30956, N53261, N53280, N53284, N53290, N53296, N53299, N53309, N53317, N53324, N53337, N53340, N53347, N53355, N53356, N53361, N53364, N53366, N53373, N53388, N53390, N53392, N53397, N53402, N53405, N53407, N53409, N53411, N53413, N53416, N53419, N53426, N53434, N53437, N53438, N53449, N63635, N63637, N63646, N63651, N63696, N63704, N63718, N63736, N63740, N63745, N63803, P50018, P50025, P50036, P50050, P50054, P50083, P63990, R21906, R21930, R21985, R21991, R41366, R42431, R56904, R56911, R56932, R56948, R75603, R75635, R75644, S28269, S28335, S28336, S65405, S65417, S87903, S91630, T00466, T48099, T48101, T48105 4 799504 K23796, L61578, L61597, L89794, M77214, N06109, N06248, N06731, N06908, N06911, N32484, N32493, N32514, N33627, N33880, N34238, N89280, N89817, N90599, N90812, N90849, P45299, P45435, R23598, R23753, R24022, R24310, R24543, S07095, S07147, S07164, S07250, S58162, S58237, T02774, T02897, T03020, T03027, T03038, T03047 7 701407 7Z5379 7 766007 G11181 7 774407 B207AA0057, B207AA0164, B207AA0224, B207AA0270, B207AA0546, B207AA0719, B207AA0757, B207AA0768, B207AA0775, B207AA0913, BENCAH1914, BENCAH4273, BENCAJ5690, BENCAK1601, BENCAK5082, BENCAK5701, BENCAK6044, BENCAK6586,G78791, H19147, H75592, J08985, J17315, J17370, J72117, J93428, J93669, K78068, K78149, K78378, L23953, L71885, L71922, L72170, L72261, M38646, M44626, M60192, M78767, M83783, M93487, M93549, N24007, N24131, N58891, N58905, N59040, N70414, N88273, N88281, N88306, N93477, N95003, P14688, P14851, P16547, P35320, P35374, P35475, P54474, P54594, P60383, P81375, P81382, P86353, R19478, R31305, R37450, R46879, R46934, R57593, R57744, R57769, R72169, R72236, R81458, R81507, R81527, R81612, R90895, S05652, S13843, S14099, S14103, S36805, S36885, S36896, S36994, S36995, S37166, S37554, T04613, T04687, T04739, T04806, T04812, T04814, T04837, T04843, T04885, T04903, T04960, T05000, T05108 7 5006007-02 BENCAK9696, BENCAK9900, BENCAL0760, BENCAL1937, BENCAL4577, BENCAL5766 7 5006007-01 AA0297, B207AA0069, B207AA0135, B207AA0155, B207AA0172, B207AA0177, B207AA0354, B207AA0355, B207AA0421, B207AA0493, B207AA0533, B207AA0571, B207AA0684, B207AA0756, B207AA0811, BENCAH3454, BENCAH4003, BENCAH4004, BENCAH4371, BENCAH4373, BENCAH4794, BENCAH4797, BENCAH5400, BENCAH5401, BENCAJ8559, BENCAJ8585, BENCAJ8614, BENCAJ8626, BENCAJ8656, BENCAJ9106, BENCAK5959, BENCAK5963, BENCAK9770, BENCAK9771, BENCAL2683, BENCAL3622, BENCAL3931, K20260, K20499, K20543, N09043, N65077, N65107, N65132, N93173, N93193, P23185, P23236, P49794, P49835, P92551, P92580, R12660, R12670, R12710, R35504, R35530, R36545, R43821, R54576, R54634, R79460, R79466, R92415, R92431, R92435, R92442, S11034, S11058, S11154, S11156, S11179, S11182, S11186, S11202, S11206, S56884, S56888, S56998, S57073, S57075, S57117, S57120, S57156, S57157, S57192, S57220, S57332, S57354, S57405, S57412, S57420, S57424, S57437, S57452, S57467, S57470, S57589 8 748608 B208AA0043, BENCAK1564, H50069, H64474, H64605, J57591, J94824, M54652, M54835, N14526, N84300, P-28517, P26161, P28493, P28504, P28505, P28511, P28542, P28614, P98885, S01079, S01090, S50742, S78049, S78056, S78100 8 787008 J76875, K12869, M77087, N06806, N32406, N34151, N89336, N89554, N90392, N90682 8 787028 N89693 8 787208 AA0676, B07691, B228AA0169, B228AA0242, B228AA0288, B228AA0389, B228AA0426, B228AA0537, B228AA0576, B228AA0638, B228AA0641, B228AA0746, B228AA0859, B228AA0866, B228AA0878, B228AA0905, B228AA1070, B228AA1117, BENCAH0302, BENCAH1584, BENCAH3448, BENCAJ5729, BENCAJ8175, BENCAJ8767, BENCAJ8773, BENCAJ8790, BENCAJ9142, BENCAK4678, BENCAK4771, BENCAK5470, BENCAK6156, BENCAK6162, BENCAK6398, BENCAK8259, BENCAK9252, BENCAK9261, BENCAL2604, BENCAL2642, BENCAL4344, BENCAL7699, BENCAL9217, J76954, K11762, K12737, K12765, L89874, M41582, M41586, M41918, M76995, M77005, M77119, N06396, N33501, N33769, N33774, N33776, N33784, N34183, N34207, N89068, N89079, N89082, N89087, N89089, N89404, N89409, N89699, N89702, N89708, N89895, N89898, N90251, N90344, N90990, P43853, P43872, P43891, P43956, P43986, P44338, P45405, R23233, R23836, R23873, R24174, R24227, R24677, R24739, R24816, R24824, R91601, R91825, R91870, R91947, R92114, R92308, S07578, S07629, S07758, S07768, S07775, S39269, S39468, S39513, S39638, S39655, S39663, S39753, S39822, S39837, S39951, S39973, S39995, S40027, S40038, S40077, S40079, S400958 789608 H03942, J21516 8 792038 B228AA0039, BENCAJ8836 8 797938 B228AA0487, B228AA1034, BENCAJ8910, BENCAL5921, N06290, N33267, N90703, N90970, S70436, T03512 8 5005008-01 T03421, B228AA0052, B228AA0287, B228AA0405, B228AA0490, B228AA0519, BENCAH1577, L60763, M77630, N06193, N32395, N32524, N33073, N33304, N33466, N89447, N89464, P44800, P45226, R24458, R91359, R91787, S07967, S70327, S70429, S70463, S70494, S70520, T03317, T03452, T03476, T03506, T03549 8 5006008-01 R24001 9 701509 5A1936, J89101, L56782, L85804, M09404, M73608, M84236, N02058, N02998, N209AA0242, N209AA0246, N209AA0323, N209AA0418, N209AA0634, N22582, N56942, N56952, N79878, N97637, N97707, N98354, N99323, NENCAH0592, NENCAH0697, NENCAH0883, NENCAH1173, NENCAH1422, NENCAH1432, P11303, P11463, P12707, P52176, P52596, P52608, P97654, P97704, P98673, R18109, R18342, R18385, R45763, R45850, R46297, R46394, R46403, R72835, R72839, R72846, R73002, R74484, S00704, S00765, S00824, S00886, S00909, S00910, S18837, S18941, S19027, S50340, S70059, S77627, S77671, S77784, S77809, T18893, T18909, T27458, T27587 9 739509 H17622 9 772509 K23758, K24989, K86136, L15428, M40393, M40397, N42380, N56529, N79955, N79970, N80784, N96815, N96816, N96904, N96905, N97800, N97806, N99352, N99353, N99362, N99367, N99368, N99376, P11398, P11407, P11411, P11414, P11419, P12231, P76976, P76987, P76990, P76992, P76994, R17787, S01222, S02183, S50825 9 798509 AA0579, B209AA0068, B209AA0086, B209AA0100, B209AA0103, B209AA0105, B209AA0185, B209AA0261, B209AA0304, B209AA0364, B209AA0420, B209AA0429, B209AA0434, B209AA0461, B209AA0518, B209AA0542, B209AA0551, B209AA0619, B209AA0632, B209AA0649, B209AA0707, BENCAH2176, BENCAJ6152, BENCAJ9319, BENCAJ9337, BENCAJ9348, BENCAJ9359, BENCAJ9366, BENCAK0166, BENCAK4404, BENCAK4409, BENCAL0725, BENCAL2575, BENCAL4022, BENCAL6238, N03324, N42399, N42401, N56700, N97809, N99501, P53159, P77576, R72583, R73591, R74285, S02121, S02165, S79341, S79364, S79409, S79414, S94376, S94384, S94391 10 770510 G80186 10 772510 B210AA0003, B210AA0024, B210AA0062, B210AA0128, B210AA0263, B210AA0339, B210AA0398, B210AA0520, B210AA0538, B210AA0549, B210AA0563, B210AA0619, B210AA0684, B210AA0727, B210AA0744, B210AA0785, B210AA0860, B210AA0862, B210AA0956, B210AA0984, B210AA1073, B210AA1081, B210AA1137, BENCAH1958, BENCAH2165, BENCAH2280, BENCAJ5741, BENCAJ9159, BENCAJ9705, BENCAJ9757, BENCAJ9767, BENCAJ9773, BENCAJ9805, BENCAK4597, BENCAK5154, BENCAK5350, BENCAK5735, BENCAK5773, BENCAK6465, BENCAK9082, BENCAK9123, BENCAK9429, BENCAK9434, BENCAL1600, BENCAL1635, BENCAL2434, BENCAL3279, BENCAL5558, BENCAL6141, BENCAL6373, H17769, H32904, H34713, H57950, H76378, K56398, K66132, K86040, L15008, L32061, L55910, L56859, L86006, M10588, M10987, M39587, M39591, M49011, M49358, M49359, M73918, M86490, N02251, N02274, N11091, N22833, N42134, N56280, N57181, N57382, N57418, N57437, N80225, N80703, N80716, N80718, N81110, N81114, N81474, N97025, N97067, N97527,N97553, N97574, N97591, N97832, N98539, N98750, N98764, N98768, N98798, P11004, P11017, P11029, P11039, P11087, P11094, P11101, P11562, P11575, P11834, P12009, P12612, P12615, P12645, P12648, P51452, P51454, P51833, P51883, P52238, P53116, P53207, P53327, P76886, P76891, P77070, P77161, P77180, P77423, P77618, P77663, P77668, P77744, P77752, P97017, P98117, P98258, P98840, R18022, R18124, R18611, R18665, R19275, R46329, R46679, R72606, R72615, R72617, R72874, R73345, R74396, S01267, S01277, S01369, S01501, S01631, S01680, S19280, S19293, S19294, S19298, S19328, S19440, S19447, S19458, S19467, S19486, S19512, S51089, S51144, S51176, S51210, S78237, S78294, S78298, S78318, S78439, S78464, S78511, S78623, S78642, S78724, T19014, T19091, T19152, T19169, T28070, T28091, T28136, T28138, T49026, T49044, T49055, T49068, T49089 11 701411 G29388, G43952 11 769611 H16901 11 772511 AA0065, B211AA0047, B211AA0157, B211AA0171, B211AA0263, B211AA0301, B211AA0349, B211AA0356, B211AA0517,B211AA0529, B211AA0599, B211AA0622, B211AA0624, B211AA0705, B211AA0798, B211AA0823, B211AA0945, B211AA1004, B211AA1107, B211AA1166, B211AA1212, B211AA1292, B211AA1360, BENCAH0264, BENCAH2171, BENCAH5424, BENCAJ8130, BENCAK0910, BENCAK7121, BENCAK7336, BENCAK7407, BENCAK7412, BENCAK7417, BENCAK7523, BENCAL2881, BENCAL2959, BENCAL3030, H58238, H99450, J24528, J68900, J88334, K24665, K35705, K85911, L15671, L30512, L84603, L84967, M11198, M11208, M40116, M49492, M49540, M49551, M61349, M61810, M61821, M61827, M73414, M86423, M86943, M87075, N02874, N03522, N21358, N22738, N41160, N41282, N41646, N41748, N42587, N42774, N56399, N56596, N57323, N57878, N57899, N57939, N57953, N80541, N80554, N80580, N81408, N93700, N96929, N96947, N96955, N97354, N97368, N97956, N97977, N98242, N98245, N98573, N98587, N98612, N98949, N98963, N98974, N98976, N98981, N98985, N99526, N99535, N99551, N99553, N99564, N99590, P03620, P11615, P11637, P11959, P11981, P12385, P12387, P12399, P12743, P12777, P12930,P51979, P52109, P52732, P52903, P52910, P76731, P76820, P76832, P76857, P77637, P77642, P97786, R05382, R05539, R05747, R29690, R29884, R30070, R30119, R30137, R30157, R30194, R30226, R30258, R30313, R30429, R30504, R30534, R30617, R30625, R30808, R30810, R30906, R30941, R30993, R31009, R31035, R31073, R31118, R46248, R46361, S03667, S03741, S03745, S03805, S04156, S04451, S04460, S04473, S04542, S04543, S04557, S04564, S04582, S04649, S80373, S80389, S80465, S80547, S80588, S80617, S80682, S80740, S80765, T22044, T22052, T22099, T22202, T22236, T22261, T22353, T22378, T22395, T22405, T22521, T22533, T22593, T22608, T22653, T22797, T22835, T22873, T22895, T22949, T23006 12 717312 2B1946, 3A7441 12 772512 B212AA0565, B212AA0864, H58261, H58448, J23046, J68527, J89283, K04097 K23952, K23992, K35819, K55628, K55951, K56079, K66470, K66500, K86442, K86447, L15502, L30899, L31589, L32003, L56276, L56294, L56303, L56308, L56886, L85095, L86236, M10233, M10966, M40081, M49574, M49665, M73392, M84838, N02466, N03990, N21261, N22069, N22894, N41128, N41249, N41717, N42236, N42871, N56325, N57451, N58072, N58127, N80601, N81044, N81173, N81187, N97079, N97083, N97109, N97384, N97438, N97455, N97457, N97893, N97916, N98152, N98162, N98654, N98657, N98680, N98691, N99016, N99025, N99049, N99057, N99094, N99125, P11154, P11179, P11183, P11193, P11252, P11678, P11699, P11877, P11879, P11909, P12244, P12277, P12493, P12519, P51414, P52139, P52409, P52520, P52871, P53141, P53351, P53396, P72298, P76702, P76921, P76931, P77096, P77294, P77338, P77695, P77796, P78510, P97315, R17703, R17746, R18201, R18319, R18589, R19042, R45067, R45829, R46100, R46108, R46121, R46707, R52615, R72811, R73024, R73783, R74357, S01858, S01860, S01914, S01923, S01949, S01969, S01971, S01980, S01994, S02002, S02007, S19593, S19644, S19843, S51370, S51437, S51514, S51519, S51560, S51571, S78825, S78841 12 798512 B212AA0009, B212AA0045, B212AA0051, B212AA0060, B212AA0073, B212AA0077, B212AA0082, B212AA0142, B212AA0155, B212AA0290, B212AA0293, B212AA0361, B212AA0428, B212AA0586, B212AA0618, B212AA0647, B212AA0735, B212AA0747, B212AA0942, B212AA0974, B212AA1031, B212AA1062, B212AA1098, B212AA1173, BENCAH1931, BENCAH4104, BENCAJ4925, BENCAJ6158, BENCAJ7821, BENCAJ8115, BENCAJ9478, BENCAJ9497, BENCAJ9503, BENCAJ9530, BENCAJ9617, BENCAJ9673, BENCAK0455, BENCAK2377, BENCAK4552, BENCAK5787, BENCAK8605, BENCAK9227, BENCAL1655, BENCAL2487, BENCAL4173, BENCAL6328, BENCAL6602, M86993, N42703, N42708, N57617, N57629, N80087, N80088, N98138, N99136, N99144, P53305, P76909, P76916, P77722, P78317, R17334, R46556, R46562, R73201, R74214, S02217, S02254, S51853, S79575, S94530, S94534, S94538, S94539, S94569, S94579, S94590, S94615, T19187, T19213, T19220, T19242, T19277, T19292, T19314, T28638, T43059 (b) For the purpose of this AD, a shop visit is defined as an engine removal, where engine maintenance entails separation of pairs of major mating engine flanges or the removal of a disk, hub, or spool regardless of other planned maintenance except where the maintenance is being done in lieu of performing the maintenance on wing. (c) The accomplishment of the inspections and repairs specified in this AD must be performed at GE Engine Services - Dallas, LP., certificate number RA1R445K of Dallas, Texas. Operators wishing to use another facility to perform the required inspections and repairs must apply for an alternative method of compliance in accordance with paragraph (e) of this AD. (d) Report the following information on a monthly basis to the Manager of the Engine Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803-5299; fax (781) 238-7199, Internet: Mark.C.Fulmer@faa.dot.gov. Reporting requirements have been approved by the Office of Management and Budget and assigned OMB control number 2120-0056: (1) S/N of disks inspected in accordance with paragraph (a) of this AD (2) S/N of disks found with arc burns and approximate size of the arc burn. (3) S/N of disks repaired in accordance with paragraph (a) of this AD. (4) Hours and CIS since last shop visit and total hours and CIS of disks inspected in accordance with paragraph (a) of this AD. (5) Report to the Manager of the Engine Certification Office, within two business days of finding one of the following conditions as a result of inspecting a disk in accordance with paragraph (a) of this AD: (i) A crack depth of more than 5 mils. (ii) More than 2 tie rod holes with cracks. (iii) Arc burn depth beyond 9 mils. (e) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office. Operators shall submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (f) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the aircraft to a location where the inspection requirements of this AD can be accomplished. (g) The actions required by this AD shall be done in accordance with the following GE Engine Services - Dallas, LP, EB: Document No Pages Date JT8D-025 1-3 March 27, 1998. Total Pages: 3. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from GE Engine Services - Dallas LP, 9311 Reeves St., Dallas, TX 75235-2095. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; orat the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC. (h) This amendment becomes effective on November 16, 1998.