# Boeing 720-B - Type: Aircraft model (FAA registry) - Registry code: 1383804 - Manufacturer (registry): BOEING - Model: 720-B - Aircraft type: Fixed wing multi engine - Category: Airplane - Engines: 4 · Turbo-jet - Seats: 143 - Weight class: 20,000 lb and over - Cruise speed: 466 mph - Certification: Type certificated - Data sheet: [TCDS 4A28](https://openairdocs.org/tcds/4A28) (OpenAirDocs) - Holder: The Boeing Company - Registered aircraft: 0 - Page: https://openairdocs.org/model/boeing-720-b Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026 - [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023 - [AD 2020-03-11](https://openairdocs.org/ad/2020-03-11): Fuel · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Mar 18, 2020 - [AD 2018-23-12](https://openairdocs.org/ad/2018-23-12): Equipment/furnishings · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 180 more. Effective Dec 28, 2018 - [AD 2018-19-32](https://openairdocs.org/ad/2018-19-32): Nacelles/pylons · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 2, 2018 - [AD 2018-19-21](https://openairdocs.org/ad/2018-19-21): Fuel · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 1, 2018 - [AD 2017-09-04](https://openairdocs.org/ad/2017-09-04): Fuselage · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jun 8, 2017 - [AD 2016-08-11](https://openairdocs.org/ad/2016-08-11): Stabilizers · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective May 27, 2016 - [AD 2015-11-04](https://openairdocs.org/ad/2015-11-04): Nacelles/Pylons · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jul 6, 2015 - [AD 2014-16-09](https://openairdocs.org/ad/2014-16-09): Oxygen · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 16 more. Effective Sep 23, 2014 - [AD 2014-13-11](https://openairdocs.org/ad/2014-13-11): Fuselage · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Aug 19, 2014 - [AD 2013-24-07](https://openairdocs.org/ad/2013-24-07): Fuel · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jan 7, 2014 - [AD 2013-03-19](https://openairdocs.org/ad/2013-03-19): Electrical Power · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Mar 21, 2013 - [AD 2012-16-12](https://openairdocs.org/ad/2012-16-12): Nacelles/Pylons · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Sep 21, 2012 - [AD 2011-12-01](https://openairdocs.org/ad/2011-12-01): Equipment/Furnishings · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 268 more. Effective Aug 1, 2011 - [AD 2011-01-09](https://openairdocs.org/ad/2011-01-09): Oxygen · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 290 more. Effective Feb 9, 2011 - [AD 2008-04-11 R1](https://openairdocs.org/ad/2008-04-11-R1): Fuel tank systems · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jan 12, 2010 - [AD 2009-18-10](https://openairdocs.org/ad/2009-18-10): Wings · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Oct 14, 2009 - [AD 2009-15-06](https://openairdocs.org/ad/2009-15-06): Fuel System · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Aug 25, 2009 - [AD 2008-04-06](https://openairdocs.org/ad/2008-04-06): Left side and right side flight deck · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Mar 28, 2008 - [AD 2007-23-12](https://openairdocs.org/ad/2007-23-12): Fuel quantity indication system (FQIS) · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Dec 18, 2007 - [AD 2007-21-15](https://openairdocs.org/ad/2007-21-15): Elevator hinge support fittings · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 20, 2007 - [AD 2006-06-05](https://openairdocs.org/ad/2006-06-05): Front spar upper chords · Boeing 720 Series and 720B Series. Effective Apr 3, 2006 - [AD 2005-20-02](https://openairdocs.org/ad/2005-20-02): Airplane flight manual (AFM) · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 1, 2005 - [AD 2005-08-15](https://openairdocs.org/ad/2005-08-15): Outboard engine nacelle · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective May 31, 2005 - [AD 2005-04-01](https://openairdocs.org/ad/2005-04-01): Overwing Fuel Fill Ports · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 23 more. Effective Mar 23, 2005 - [AD 2004-25-09](https://openairdocs.org/ad/2004-25-09): Main landing gear (MLG) trunnion · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jan 13, 2005 - [AD 2004-22-24](https://openairdocs.org/ad/2004-22-24): High frequency eddy current (HFEC) inspections for corrosion and cracking · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Dec 14, 2004 - [AD 2004-20-02](https://openairdocs.org/ad/2004-20-02): Wing fillet flap support link · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 4, 2004 - [AD 2004-07-06](https://openairdocs.org/ad/2004-07-06): Aft trunnion support fitting of each main landing gear · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective May 11, 2004 - [AD 2004-05-14](https://openairdocs.org/ad/2004-05-14): Wing front spar upper chord · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Apr 14, 2004 - [AD 2003-03-15 R1](https://openairdocs.org/ad/2003-03-15-R1): Airplane Flight Manual (AFM) - oxygen masks · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 90 more. Effective Dec 22, 2003 - [AD 2002-02-02](https://openairdocs.org/ad/2002-02-02): Support Structure for the Main Landing Gear (MLG) Uplock Mechanism · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Mar 11, 2002 - [AD 2001-22-14](https://openairdocs.org/ad/2001-22-14): Fire Extinguishing System Bottle Cartridges · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 105 more. Effective Dec 10, 2001 - [AD 2001-18-05](https://openairdocs.org/ad/2001-18-05): Flight Eagle Tires · Boeing 720 Series, 720B Series, 111 and 6 more. Effective Sep 24, 2001 - [AD 2000-24-20](https://openairdocs.org/ad/2000-24-20): Lower Skin Wings · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jan 8, 2001 - [AD 95-17-01](https://openairdocs.org/ad/95-17-01): Upper Center Section Cracks · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Sep 13, 1995 - [AD 94-10-06](https://openairdocs.org/ad/94-10-06): Aging Airplane Inspections · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jun 20, 1994 - [AD 93-14-12](https://openairdocs.org/ad/93-14-12): Crewmember Protective Breathing Equipment Units · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 201 more. Effective Sep 2, 1993 - [AD 93-11-02](https://openairdocs.org/ad/93-11-02): Midspar Fittings Inspection · Modification of the Boeing Model 707-300B (Omega Aviation Services STC SA2699NM or 2 others). Effective Jul 6, 1993 - [AD 93-05-17](https://openairdocs.org/ad/93-05-17): Cabin Window Inspection · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 22 more. Effective May 5, 1993 - [AD 92-10-10](https://openairdocs.org/ad/92-10-10): Main Landing Gear Brakes · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jul 2, 1992 - [AD 91-22-04](https://openairdocs.org/ad/91-22-04): Main Cargo Door · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 9 more. Effective Nov 29, 1991 - [AD 91-07-19](https://openairdocs.org/ad/91-07-19): Structural Modifications · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Apr 29, 1991 - [AD 90-25-07](https://openairdocs.org/ad/90-25-07): Corrosion Control Program · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Dec 31, 1990 - [AD 85-12-01 R1](https://openairdocs.org/ad/85-12-01-R1): Significant Structural Detail Inspection · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 14, 1986 - [AD 83-24-03](https://openairdocs.org/ad/83-24-03): Tab Control Rod Assys · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Jan 3, 1984 - [AD 80-22-12 R2](https://openairdocs.org/ad/80-22-12-R2): Leading Edge Devices · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 22 more. Effective Jun 21, 1983 - [AD 79-24-04 R1](https://openairdocs.org/ad/79-24-04-R1): Horizontal Stabilizer · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 3 more. Effective Apr 4, 1983 - [AD 82-24-03](https://openairdocs.org/ad/82-24-03): Nacelle Strut Diagonal Braces · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Nov 23, 1982 Historical (superseded or no longer in force): - [AD 2012-17-13](https://openairdocs.org/ad/2012-17-13) (historical): Stabilizers · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Oct 16, 2012 - [AD 2008-17-10](https://openairdocs.org/ad/2008-17-10) (historical): Elevator rear spar · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Oct 2, 2008 - [AD 2008-04-11](https://openairdocs.org/ad/2008-04-11) (historical): Fuel tank systems · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Mar 28, 2008 - [AD 2001-17-20](https://openairdocs.org/ad/2001-17-20) (historical): Wiring for the Fuel Boost and Override Pumps · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 7 more. Effective Oct 1, 2001 - [AD 74-08-09 R2](https://openairdocs.org/ad/74-08-09-R2) (historical): Waste Receptacles · Aero Spacelines 377, 377MG, 377SGT and 268 more. Effective Jul 29, 1996 All 146: https://openairdocs.org/model/boeing-720-b/ads.md ## Information bulletins (advisory) (4) - [SAIB NE-19-03](https://openairdocs.org/saib/NE-19-03): Escape Slide Maintenance Tasks and Intervals - JASC 2565. Issued Feb 19, 2019 - [SAIB NM-15-03](https://openairdocs.org/saib/NM-15-03): Flight Controls. Issued Nov 24, 2014 - [SAIB NM-09-03](https://openairdocs.org/saib/NM-09-03): Engine Fuel and Control - Implementing Fuel Tank System Airworthiness Limitations. Issued Dec 11, 2008 - [SAIB NM-06-57](https://openairdocs.org/saib/NM-06-57): Reports of damage to airplanes and to property on the ground caused by blue or clear ice falling from airplanes.. Issued Jul 27, 2006 ## Registered aircraft None registered with this model now. ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CHI65A0069](https://openairdocs.org/ntsb/CHI65A0069), Jan 23, 1965: Boeing B-720B (N725US), Chicago, IL, no damage ## FAA accident and incident reports None matched to aircraft with this model. ## Service difficulty reports (1) As reported by operators and repair stations, by the model named in the report. - [SDR CA970305007](https://openairdocs.org/sdr/CA970305007), Feb 23, 1997: ENGINE. MAKING METAL. (CAN) DURING CLIMB THE #3 ENGINE OIL PRESSURE AND TEMPERATURE INCREASED SLIGHTLY ABOVE MAXIMUM. PREVIOUS POWER SETTING WERE RESTORED AND THE ENGINE PARAMETERS R ## STCs that may be installed (OpenAirDocs) (80, first 50) Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc. Lists 720 Series - [STC SA2579WE](https://openairdocs.org/stc/SA2579WE): Modify installation of wing tip mounted emblem light. The Boeing Company - [STC ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited - [STC SA808EA](https://openairdocs.org/stc/SA808EA): Installation of inflight motion picture system. Approved for models 720-047B, 707-347C, 707-351C (serial numbers 19773 and 19774 only). Burrana Inc. Lists 720 Series - [STC SA278EA](https://openairdocs.org/stc/SA278EA): See Document No. Report No. 3187, dated April 18, 1967, Revised January 30, 1969, concerning Inflight Motion Picture System. Burrana Inc. Lists 720 Series - [STC SA1-593](https://openairdocs.org/stc/SA1-593): Inflight Motion Picture Pallet Assembly. Burrana Inc. Lists 720 Series - [STC SA7076NM](https://openairdocs.org/stc/SA7076NM): Installation of Stretcher Carrier. Air Medic LLC - [STC SA1079WE](https://openairdocs.org/stc/SA1079WE): Revision of Passenger Interior by addition of fabric cargo bins, per FAA Approved United Airlines Drawing List No. COA 4-1222, or later FAA approved revision. United Airlines Inc. Lists 720 Series - [STC SA1169WE](https://openairdocs.org/stc/SA1169WE): Installation of Cockpit Voice Recorder in accordance with United Airlines Engineering Report No. F-1021, dated June 9, 1965, revised November 9, 1965. United Airlines Inc. Lists 720 Series - [STC SA1222WE](https://openairdocs.org/stc/SA1222WE): Replace standard Boeing engine thrust reverser forward pressure seal with improved type shown in United Air Lines drawing 3F-10888 and described in United Air Lines Report F-1010. United Airlines Inc. Lists 720 Series - [STC SA1245WE](https://openairdocs.org/stc/SA1245WE): Installation of either single or dual Collins AL-101 Radio Altimeter Systems in accordance with FAA Approved United Air Lines Report F-1101. United Airlines Inc. Lists 720 Series - [STC SA1291WE](https://openairdocs.org/stc/SA1291WE): Installation of Boeing 720 Forward Lounge Revision (divider). United Airlines Inc. Lists 720 Series - [STC SA1396WE](https://openairdocs.org/stc/SA1396WE): Installation of McMillan Radome P/N 2406 as a replacement for Boeing Radome P/N 65-2040. United Airlines Inc. Lists 720 Series - [STC SA1447WE](https://openairdocs.org/stc/SA1447WE): Boeing 720-22 Alternate Seating Configuration (UAL Change Order Authorization COA 4-1477) per United Air Lines Drawing List No. COA 4-1477 dated July 3, 1967. United Airlines Inc. Lists 720 Series - [STC SA1553WE](https://openairdocs.org/stc/SA1553WE): Installation of Fairchild P/N 13920-301 or 15630-601 Flight Data Recorder and Honeywell P/N 180 VI Central Data Computer in accordance with United Air Lines Report F-1171 dated March 21, 1967 and revised December 4, 1967 or later FAA approved revision. United Airlines Inc. Lists 720 Series - [STC SA1619WE](https://openairdocs.org/stc/SA1619WE): Installation of passenger seats in forward cabin area. United Airlines Inc. Lists 720 Series - [STC SA1628WE](https://openairdocs.org/stc/SA1628WE): Installation of passenger seats in cabin area. United Airlines Inc. Lists 720 Series - [STC SA2051WE](https://openairdocs.org/stc/SA2051WE): Alternate seating configuration in accordance with FAA Approved United Airlines Drawing List COA 4-1605, or later FAA approved revisions. United Airlines Inc. Lists 720 Series - [STC SA2206WE](https://openairdocs.org/stc/SA2206WE): Installation of Bendix Third Attitude Indicator to meet the requirements of 14 CFR § 121.305(j). United Airlines Inc. Lists 720 Series - [STC SA2347WE](https://openairdocs.org/stc/SA2347WE): Installation of Door Mounted Inflatable Evacuation Slide; Sargent Industries P/N 6176700 in accordance with FAA Approved United Airlines Drawing 9F9324 "Slide Installation - Aft Entry/Galley Door.". United Airlines Inc. Lists 720 Series - [STC SA260WE](https://openairdocs.org/stc/SA260WE): Applicable aircraft may be modified to have alternate interior arrangements consisting of 28 four abreast seats or 35 five abreast seats forward of a class divider and 78 six abreast seats aft of a class divider. United Airlines Inc. Lists 720 Series - [STC SA2744WE-D](https://openairdocs.org/stc/SA2744WE-D): Alternate 143 passenger seating configuration. (720-022). United Airlines Inc. Lists 720 Series - [STC SA2746WE-D](https://openairdocs.org/stc/SA2746WE-D): Alternate 149 passenger seating configuration. (720-022). United Airlines Inc. Lists 720 Series - [STC SA2831WE-D](https://openairdocs.org/stc/SA2831WE-D): Couple EDO Loran System to ADF Sense Antenna instead of Fin Cap (No Fin Cap on UAL B720) in accordance with COA-4-1724 Master Drawing List, ER 2, or later FAA approved revisions. Airplane to be test flown. United Airlines Inc. Lists 720 Series - [STC SA2833WE-D](https://openairdocs.org/stc/SA2833WE-D): Installs two HF communications systems per United Air Lines drawing COA 4-1723. The system design is as much like Boeing installation on W. A. L. airplanes as possible but using Aeronautical Engineers Inc. design dual wire antenna systems per drawings AE2257 and AE2264 and South Eastern Region STC No. ST564SO. (720-022). United Airlines Inc. Lists 720 Series - [STC SA2834WE-D](https://openairdocs.org/stc/SA2834WE-D): : Alternate 101 passenger seating configuration in accordance with United Air Lines Drawing List No. COA-4-1744 or later FAA approved revisions. United Airlines Inc. Lists 720 Series - [STC SA302EA](https://openairdocs.org/stc/SA302EA): Inflight motion picture system. United Airlines Inc. Lists 720 Series - [STC SA353WE](https://openairdocs.org/stc/SA353WE): United Air Lines B-720-022 Cabin Interior Arrangement (one class) five abreast seating. United Airlines Inc. Lists 720 Series - [STC SA4-1570](https://openairdocs.org/stc/SA4-1570): The interior arrangements in the applicable aircraft have been revised as indicated by the following United Air Lines documents: 1. 7 rows of First Class seats and 12 rows of Tourist Seats per United Air Lines Drawing 6F-8042 "no change" or (continued on page 3 ). United Airlines Inc. Lists 720 Series - [STC SA458WE](https://openairdocs.org/stc/SA458WE): Installs Crimsco Jet Cargo Container, Part No. 04-005-01, including jet cargo container seat track latch assembly, Part No. 04-005-03 in main passenger compartment as shown on and per the schedules noted on United Air Lines Drawing 15F-2228, Change "B". United Airlines Inc. Lists 720 Series - [STC SA846WE](https://openairdocs.org/stc/SA846WE): Modify cabin interior arrangement to a three-class configuration. United Airlines Inc. Lists 720 Series - [STC SA890WE](https://openairdocs.org/stc/SA890WE): Installation of a Passenger Entertainment System per United Air Lines Report No. F-991 dated January 28, 1965, revision February 23, 1965. United Airlines Inc. Lists 720 Series - [STC ST10209SC](https://openairdocs.org/stc/ST10209SC): Installation of Dual Innovative Solutions & Support (IS&S) air data display system units. AeroMech Incorporated - [STC SA5971NM](https://openairdocs.org/stc/SA5971NM): Installation of flame reistant cargo covers. Air Transport International LLC - [STC ST657SO](https://openairdocs.org/stc/ST657SO): Installation of Mace Galley Model No. 101 in aft passenger compartment and Mace Galley Model No. 102 in forward passenger compartment. (720-023B and 720-030B). B/E Aerospace - [STC SA1241EA](https://openairdocs.org/stc/SA1241EA): Installation of rear and forward folding stairs. Patrick Aircraft Products Inc - [STC ST662SO](https://openairdocs.org/stc/ST662SO): Installation of Radome. Saint-Gobain Performance Plastics Corp - [STC SA2795SW](https://openairdocs.org/stc/SA2795SW): Installation of removable airstair. Sierra Industries, Inc. Lists 720 Series - [STC SA2803SW](https://openairdocs.org/stc/SA2803SW): Installation of seat support subfloor beams and tracks. Sierra Industries, Inc. Lists 720 Series - [STC SA2805SW](https://openairdocs.org/stc/SA2805SW): Installation of Dual Delco Carousel IVA Inertial Navigation Systems. Sierra Industries, Inc - [STC SA4326SW](https://openairdocs.org/stc/SA4326SW): Structural provisions for mid-lavatory service panel. Sierra Industries, Inc - [STC SA4015NM](https://openairdocs.org/stc/SA4015NM): Modification of the Boeing Model720B airplanes. Omega Aviation Services Ltd - [STC SA1388CE](https://openairdocs.org/stc/SA1388CE): In accordance with PMC Drawing 70J2482, or later FAA approved revision, the magnesium or aluminum forward thrust reverser blocker doors are replaced with nylon doors manufacture per PMC Drawing 70J2481, Revision E, or later FAA approved revisions. P & R Trading Inc - [STC ST00225AT](https://openairdocs.org/stc/ST00225AT): Installation of tray carriers. BFE Services - [STC SA2806SW](https://openairdocs.org/stc/SA2806SW): Installation of Stewart-Davis, Inc. auxiliary power unit. Steward-Davis Intn'l, Inc - [STC SA2687SO](https://openairdocs.org/stc/SA2687SO): Installation of Hush Kits. Quiet Technology Venture, Ltd - [STC SA460CE](https://openairdocs.org/stc/SA460CE): Replace main wheel and brake assemblies with Bendix wheel assembly P/N 152051-5 or P/N152051-4 and Bendix brake assembly P/N 2600997-3. (720B-024B, -051B, -023B) (720-062, -023, -027, -060B, -025, -058B, -059B, -048, -022, -040B, -030B, -068B, -047B). Bendix Corporation - [STC ST806SO](https://openairdocs.org/stc/ST806SO): Installation of a cargo floor, smoke detector system and cargo restraint bulkhead. Aeronautical Engineers, Inc. Lists 720 Series - [STC ST931SO](https://openairdocs.org/stc/ST931SO): Addition of smoke detector system for conversion to cargo carrier. MCA Leasing Corporation - [STC ST932SO](https://openairdocs.org/stc/ST932SO): Mechanical landing gear position indicator. MCA Leasing Corporation All 80: https://openairdocs.org/model/boeing-720-b/stcs.md --- 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.