# AD 93-05-17: Cabin Window Inspection - Type: Airworthiness directive - Status: Current - Products: Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body, 707-200, 707-300 Series, 707-300B Series, 707-300C Series, 707-400 Series, 720 Series, 720B Series, 727-100 Series, 727-100C Series and 13 more - Effective: May 5, 1993 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8521 - Docket: 92-NM-10-AD - Registered aircraft: 854 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DB2774D2F888469C8625696F0071E730.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/93-05-17 ## The airworthiness directive 93-05-17 BOEING: Amendment 39-8521. Docket No. 92-NM-10-AD. Supersedes AD 82-08- 09, Amendment 39-4364. Applicability: Applies to Model 707/720, series airplanes, listed in Boeing Service Bulletin 2983, Revision 5, dated January 31, 1991; Model 727 series airplanes listed in Boeing Service Bulletin 727-53-0086, Revision 11, dated August 8, 1991; and Model 737 series airplanes listed in Boeing Service Bulletin 737-53-1023, Revision 11, dated May 16, 1991; certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent depressurization as a result of failure of the control cabin window post structure, accomplish the following: (a) Inspect the E-F window posts for cracks in accordance with the schedule set forth in Table 1, 2, or 3 of this AD, as applicable: TABLE 1 Model 707/720 E-F Window Post Inspection (Applicable Boeing Service Bulletin 2983) Airplane Condition Inspection Requiredin accordance with Revision 4, 5, or 6 of Service Bulletin Initial Inspection not to exceed (flight cycles) Repeat Inspection Interval not to exceed (flight cycles) 1. Service Bulletin not accomplished. X-ray of E-F window post. 1,650 after May 21,1982 (effective date of AD 82-08-09), or prior to accumulation of 11,650, whichever occurs later. 3,300 2. Repaired or modified per Original Issue of Service Bulletin. X-ray of E-F window post. 1,650 after May 21, 1982, or prior to accumulating 10,000 after repair or modification, whichever occurs later. 3,300 3. Repaired or modified per Revision 1, 2, 3, 4, 5, or 6 of Service Bulletin. (Modification was accomplished without using eddy current inspection to verify structure was free of cracks.) Close visual for cracks of external doubler and the exposed portion of the E-F window post with the #2 sliding window open. 1,650 after May 21, 1982; or prior to accumulating 16,650 after repair or mod- ification; whichever occurs later. 3,300 4. Repaired or modified per Revision 1 of Service Bulletin. Visual inspection for sufficient edge margin of all of the strap fastener holes. 1,650 after effective date of this AD. None 5. Modified per Revision 2, 3, 4, 5, or 6 of Service Bulletin (verified no cracks in structure using eddy current inspection described in Revision 4 or 5 of Service Bulletin). Close visual for cracks of external doubler and the exposed portion of the E-F window post with the #2 sliding window open. 3,300 after effective date of this AD, or 24,000 after strap installation, whichever is later. 3,300 TABLE 2 Model 727 E-F Window Post Inspection (Applicable Boeing Service Bulletin 727-53-0086) Airplane Condition Inspection Required in accordance with Revision 6, 7, 8, 9,10, or 11 of Service Bulletin Initial Inspection not to exceed (flight cycles) Repeat Inspection Interval not to exceed (flight cycles) 1. Service Bulletin not accomplished. X-ray of E-F window post. 1,650 after May 21, 1982 (effective date of AD 82-08-09), or prior to accumulation of 11,650, whichever occurs later. 3,300 2. Repaired or modified per Original Issue or Revision 1 of Service Bulletin. X-ray of E-F window post. 1,650 after May 21, 1982, or prior to accumulating 10,000 after repair or modification, whichever occurs later. 3,300 3. Repaired or modified per modified per Revision 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11 of Service Bulletin. (Modification was accomplished without using eddy current inspection to verify structure was free of cracks.) Close visual for cracks of external doubler and the exposed portion of the E-F window post with the post with the #2 sliding window open. 1,650 after May 21, 1982, or prior to accumulating 16,650 after repair or modification, whichever occurs later. 3,300 4. Repaired or modified per Revision 9 or 10 of Service Bulletin. Visual inspection for sufficient edge margin of all of the strap fastener holes. 1,650 after effective date of this AD. None 5. Modified per Revision 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11 of Service Bulletin (verified no cracks in structure using eddy current inspection described in Revision 6, 7, 8, 9, 10, or 11). Close visual for cracks of external doubler and the exposed portion of the E-F window post with the #2 sliding window open. 3,300 after effective date of this AD, or 24,000 after strap installation, whichever occurs later. 3,300 TABLE 3 Model 737 E-F Window Post Inspection (Applicable Boeing Service Bulletin 737-53-1023) Airplane Condition Inspection Required in accordance with Revision 6, 7, 8, 9,10, or 11 of Service Bulletin Initial Inspection not to exceed (flight cycles) Repeat Inspection Interval not to exceed (flight cycles) 1. Service Bulletin not accomplished. X-ray of E-F window post. 2,750 after May 21, 1982 (effective date of AD 82-08-09), or prior to accumulationof 12,750, whichever occurs later. 5,500 2. Repaired or modified per Original Issue or Revision 1 or 2 of Service Bulletin. X-ray of E-F window post. 2,750 after May 21, 1982, or prior to accumulating 10,000 after repair or modification, whichever occurs later. 5,500 3. Repaired or modified per modified per Revision 3, 4, 5, 6, 7, 8, 9, 10, or 11 of Service Bulletin. (Modification was accomplished without using eddy current inspection to verify structure was free of cracks.) Close visual for cracks of external doubler and the exposed portion of the E-F window post with the post with the #2 sliding window open. 1,650 after May 21, 1982, or prior to accumulating 16,650 after repair or modification, whichever occurs later. 5,500 4. Repaired or modified per Revision 9 or 10 of Service Bulletin. Visual inspection for sufficient edge margin of all of the strap fastener holes. 2,750 after effective date of this AD. None 5. Modified per Revision 3, 4, 5, 6, 7, 8, 9, 10, or 11 of Service Bulletin (verified no cracks in structure using eddy current inspection described in Revision 6, 7, 8, 9, 10, or 11). Close visual for cracks of external doubler and the exposed portion of the E-F window post with the #2 sliding window open. 3,300 after effective date of this AD, or 24,000 after strap installation, whichever occurs later. 5,500 (b) Inspect the E-N window post for cracks in accordance with the schedule set forth in Table 4, 5, or 6 of this AD, as applicable: TABLE 4 Model 707/720 E-N Window Post Inspection (Applicable Boeing Service Bulletin 2983) Airplane Condition Inspection Required in accordance with Revision 5 or 6 of Service Bulletin Initial Inspection not to exceed (flight cycles) Repeat Inspection Interval not to exceed (flight cycles) 1. Service Bulletin not accomplished; or repaired or modified per Original Issue or Revision 1, 2, 3, or 4 of Service Bulletin. X-ray of E-N windowpost. 1,650 after effective date of this AD, or prior to the accumulation of 11,650, whichever occurs later. 3,300 2. Repaired per Revision 5 or 6 of Service Bulletin (cracks in structure). X-ray of E-N window post; and close visual of external strap. 1,650 after effective date of this AD, or prior to accumulating 16,650 after repair, whichever occurs later. 3,300 3. Modified per Revision 5 or 6 of Service Bulletin (no cracks in structure). X-ray of E-N window post; and close visual of external strap. 3,300 after effective date of this AD, or 24,000 after strap installation, whichever occurs later. 6,600 TABLE 5 Model 727 E-N Window Post Inspection (Applicable Boeing Service Bulletin 727-53-0086) Airplane Condition Inspection Required in accordance with Revision 9, 10, or 11 of Service Bulletin Initial Inspection not to exceed (flight cycles) Repeat Inspection Interval not to exceed (flight cycles) 1. Service Bulletin not accomplished; or repaired or modified per Original Issue or Revision 1, 2, 3, 4, 5, 6, 7, or 8 of Service Bulletin. X-ray of E-N window post. 1,650 after effective date of this AD, or prior to the accumulation of 11,650, whichever occurs later. 3,300 2. Repaired per Revision 9, 10, or 11 of Service Bulletin (cracks in structure). X-ray of E-N window post; and close visual of external strap. 1,650 after effective date of this AD, or prior to accumulating 16,650 after repair, whichever occurs later. 3,300 3. Modified per Revision 9, 10, or 11 of Service Bulletin (no cracks in structure). X-ray of E-N window post; and close visual of external strap. 3,300 after effective date of this AD, or 24,000 after strap installation, whichever occurs later. 6,600 TABLE 6 Model 737 E-N Window Post Inspection (Applicable Boeing Service Bulletin 737-53-1023 Airplane Condition Inspection Required in accordance with Revision 9, 10, or 11of Service Bulletin Initial Inspection not to exceed (flight cycles) Repeat Inspection Interval not to exceed (flight cycles) 1. Service Bulletin not accomplished; or repaired or modified per Original Issue or Revision 1, 2, 3, 4, 5, 6, 7, or 8 of Service Bulletin. X-ray of E-N window post. 2,750 after effective date of this AD, or prior to the accumulation of 12,750, whichever occurs later. 5,500 2. Repaired per Revision 9, 10, or 11 of Service Bulletin (cracks in structure). X-ray of E-N window post; and close visual of external strap. 2,750 after effective date of this AD, or prior to accumulating 17,750 after repair, whichever occurs later. 5,500 3. Modified per Revision 9, 10, or 11 of Service Bulletin (no cracks in structure). X-ray of E-N window post; and close visual of external strap. 5,500 after effective date of this AD, or 24,000 after strap installation, whichever occurs later. 11,000 (c) Reinspect the affected areas for cracks at intervalsnot to exceed those specified in the "Repeat Inspection Interval" column of the Tables of paragraphs (a) and (b) of this AD. (d) Cracks and short edge margins must be repaired, prior to further flight, in accordance with the "Accomplishment Instructions" of the applicable service bulletin specified in paragraph (d)(1), (d)(2), or (d)(3) of this AD. After such repair, inspections must continue in accordance with the Tables of paragraphs (a) and (b) of this AD. (1) For Boeing Model 707/720 series airplanes: Boeing Service Bulletin 2983, Revision 5, dated January 31, 1991; or Revision 6, dated November 12, 1992. (2) For Boeing Model 727 series airplanes: Boeing Service Bulletin 727-53- 0086, Revision 11, dated August 8, 1991. (3) For Boeing Model 737 series airplanes: Boeing Service Bulletin 737-53- 1023, Revision 11, dated May 16, 1991. (e) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safetymay be used if approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Seattle ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Seattle ACO. (f) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (g) The repairs shall be done in accordance with Boeing Service Bulletin 2983, Revision 5, dated January 31, 1991; Boeing Service Bulletin 2983, Revision 6, dated November 12, 1992; Boeing Service Bulletin 727-53-0086, Revision 11, dated August 8, 1991; and Boeing Service Bulletin 737-53-1023, Revision 11, dated May 16, 1991; as applicable. 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 Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (h) This amendment becomes effective on May 5, 1993. ## Affected data sheets (5) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 9 of 17 models: 737-500 Series, 737-100 Series, 737-200C Series, 737-800 Series, 737-300 Series, 737-200 Series, 737-700 Series, 737-400 Series… - [TCDS A3WE](https://openairdocs.org/tcds/A3WE): The Boeing Company; names 6 of 6 models: 727-100 Series, 727 Series, 727-200 Series, 727-100C Series, 727-200F Series, 727C Series - [TCDS 4A21](https://openairdocs.org/tcds/4A21): The Boeing Company; names 4 of 4 models: 707-100B Short Body, 707-200, 707-100 Long Body, 707-100B Long Body - [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 4 of 4 models: 707-300B Series, 707-400 Series, 707-300 Series, 707-300C Series - [TCDS 4A28](https://openairdocs.org/tcds/4A28): The Boeing Company; names 2 of 2 models: 720B Series, 720 Series ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 854 (854 by airframe model, 0 by engine model) - Makers: Boeing 854 Models with the most aircraft: - [Boeing 737-823](https://openairdocs.org/model/boeing-737-823): 278 aircraft (airframe model) - [Boeing 737-800](https://openairdocs.org/model/boeing-737-800): 139 aircraft (airframe model) - [Boeing 737-824](https://openairdocs.org/model/boeing-737-824): 135 aircraft (airframe model) - [Boeing 737-832](https://openairdocs.org/model/boeing-737-832): 73 aircraft (airframe model) - [Boeing 737-890](https://openairdocs.org/model/boeing-737-890): 60 aircraft (airframe model) - [Boeing 737-724](https://openairdocs.org/model/boeing-737-724): 36 aircraft (airframe model) - [Boeing 737-790](https://openairdocs.org/model/boeing-737-790): 14 aircraft (airframe model) - [Boeing 737-752](https://openairdocs.org/model/boeing-737-752): 13 aircraft (airframe model) - [Boeing 727-223](https://openairdocs.org/model/boeing-727-223): 9 aircraft (airframe model) - [Boeing 737-400](https://openairdocs.org/model/boeing-737-400): 8 aircraft (airframe model) - [Boeing 737-852](https://openairdocs.org/model/boeing-737-852): 7 aircraft (airframe model) - [Boeing 737-500](https://openairdocs.org/model/boeing-737-500): 6 aircraft (airframe model) - [Boeing 737-436](https://openairdocs.org/model/boeing-737-436): 6 aircraft (airframe model) - [Boeing 737-700](https://openairdocs.org/model/boeing-737-700): 5 aircraft (airframe model) - [Boeing 727-227](https://openairdocs.org/model/boeing-727-227): 4 aircraft (airframe model) - [Boeing 737-300](https://openairdocs.org/model/boeing-737-300): 4 aircraft (airframe model) - [Boeing 737-883](https://openairdocs.org/model/boeing-737-883): 4 aircraft (airframe model) - [Boeing 737-205](https://openairdocs.org/model/boeing-737-205): 3 aircraft (airframe model) - [Boeing 737-490](https://openairdocs.org/model/boeing-737-490): 3 aircraft (airframe model) - [Boeing 737-484](https://openairdocs.org/model/boeing-737-484): 3 aircraft (airframe model) All 58 models: https://openairdocs.org/ad/93-05-17/models.md Every aircraft: https://openairdocs.org/ad/93-05-17/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.