Created by Chris Brady Sept 1999
Welcome to the Boeing 737 Technical Site. Here you will find technical, operational, and training notes; articles and photos contributed by 737 pilots and engineers from around the world.
Feel free to use anything here for your own personal use. If you are an organisation then please contact me for licence to use any of the images. Please note that I have a library of many thousands of technical images in high resolution.
Please treat your company FCOMs as the final authority in case your aircraft have differences. This website and the 737 Technical Guide have no connection to the Boeing Company.
If you have any suggestions or corrections to any of the information here, please email them on to me and I will write them into the site for the benefit of other visitors.
Follow the Boeing 737 Technical Site on social media using the links on the right to be notified of any updates.
*** Updated 18 Apr 2020 ***
Website updates & news...
16 Sep 2020 - The House Committee on Transportation & Infrastructure published its final report on the Design, Development, and Certification of the Boeing 737 MAX
11 Sep 2020 - Final report issued into Safair, 737-400, ZS-DMI, smoke in the cockpit event whilst climbing en-route to OR Tambo, South Africa on 19 Dec 2019
11 Sep 2020 - JOEB to conduct a multi-day simulator session in London from 14 Sep 2020 for MAX checklist & memory items.
10 Sep 2020 - GAMECO and Boeing have jointly announced that a second 737NG freighter conversion line will be built in Guangzhou
07 Sep 2020 - EASA begins MAX validation flight tests from Vancouver.
25 Aug 2020 - FAA issue AD for 737CL PSUs
11 Aug 2020 - AD issued for all CFM56 powered 737's to address engine bleed air 5th stage check valves being stuck open
07 Aug 2020 - 737-800, VT-AXH, operated by Air India Express has overrun runway 10 after landing and fell down a ravine at Kozhikode, India.
04 Aug 2020 - The FAA issue NPRM to supersede Airworthiness Directive (AD) 2018-23-51 to unground the MAX
03 Aug 2020 - The FAA have issued a 96-page Return to Service Preliminary Study for the MAX
27 Jul 2020 - The UK CAA amended Safety Directive SD 2019/001 for the 737 MAX, to introduce the possibility for managed ferry flights
24 Jul 2020 - Emergency AD issued for all CFM56 powered 737's to address engine bleed air 5th stage check valves being stuck open
21 Jul 2020 - Boeing issue FOTB "737 MAX Return to Service Operational Readiness Flight"
23 Jul 2020 - 737 Classic nacelle fatigue cracking AD issued
17 Jul 2020 - PEMCO B737-700FC (FlexCombi) gains FAA STC
15 Jul 2020 - MAX Kathon FP 1.5 Biocide AD issued today
06 Jul 2020 - MAX Operational Readiness Review flight tests to commence soon
02 Jul 2020 - FAA maps out remaining tasks to lift the MAX grounding order
29 Jun 2020 - Boeing & FAA commence a 3-day certification flight test program for the MAX
25 Jun 2020 - FAA issue MAX engine nacelle and strut electrical bonding AD
25 Jun 2020 - Boeing asked by regulators to consider further design enhancements to the MAX
19 Jun 2020 - Final report published into West Atlantic 737-400 G-JMCR electrical failures in-flight at Brussels on 4 Jun 2019
16 Jun 2020 - Gameco Inaugurates Boeing 737-800 Freighter Conversion Line
11 Jun 2020 - MAX MMEL post-MCAS fixes Revision 2 changes detailed
05 Jun 2020 - 737-400SF, N733CK, opertaed by Kalitta Charters II has overrun the runway following an RTO at Rochester, New York on 5 Jun 2020.
04 Jun 2020 - Aircraft Safety Improvement Act proposed to mandate SMS by manufacturers and consideration of HF by FAA.
29 Apr 2020 - Investigation launched into Boeing’s compliance with MAX production regulations
08 Apr 2020 - MCAS test flight delayed by a month due to Coronavirus
31 Mar 2020 - More P-8A Sales
30 Mar 2020 - Final report released into 737-800, VH-VUH Virgin Australia failure of the #1 main wheel assembly whilst taxying at Brisbane on 4 Jan 2017.
21 Mar 2020 - Final report published into the runway excursion on landing of Belavia, 737-300, EW-336PA, at Kiev on 12 July 2019
13 Mar 2020 - Preliminary report issued on TC-IZK Pegasus 737-800 runway excursion on landing at Istanbul 5 Feb 2020
09 Mar 2020 - Interim Investigation Report published into Ethiopian MAX-8 MCAS accident of 10 March 2019
06 Mar 2020 - The House Committee on Transportation & Infrastructure today published its Preliminary Investigative Findings on the 737 MAX Costs, Consequences, and Lessons from its Design, Development, and Certification.
27 Feb 2020 - Preliminary report issued into Safair, 737-400, ZS-DMI, smoke in the cockpit event whilst climbing en-route to OR Tambo, South Africa on 19 Dec 2019
25 Feb 2020 - PK-YSG, 737-300SF, Trigana Air Service, MLG collapse whilst taxying at Jayapura, Indonesia
05 Feb 2020 - TC-IZK Pegasus 737-800 runway excursion on landing at Istanbul
22 Jan 2020 - Final report published into UT Air 737-800 VQ-BJI runway excursion after landing at Sochi 01 Sep 2018
22 Jan 2020 - Revised preliminary report issued into the shooting down of UR-PSR at Tehran
19 Jan 2020 - MCAS - Special Committee investigation into FAA Certification of MAX report released
17 Jan 2020 - 737NG left temperature control valve and control cabin trim air modulating valve AD issued
10 Jan 2020 - Emails released discussing MAX differences from NG and differences to reduce certification and training impact
08 Jan 2020 - Ukranian Airlines 737-800 shot down in error by Iranian SAMs after take-off from Tehran IKA airport
30 Dec 2019 - Two new 737 ADs issued
18 Dec 2019 - The last 737NG will be delivered in Dec 2019
17 Dec 2019 - Boeing to suspend production of the MAX until recertification
16 Dec 2019 - New 737CL NGS AD issued today
15 Dec 2019 - 737 Classic differences quiz updated
13 Dec 2019 - FAA issue 737-3/4/700 BDSF 9G rigid barrier AD in response to Civil Aviation Authority of Israel AD
13 Dec 2019 - Final report issued into N772SW 737-700 in-flight uncontained engine failure on 17 April 2018
13 Dec 2019 - 737 Fuel crossfeed valve AD issued today which affects ETOPS operations
12 Dec 2019 - Details added about proposed changes to the 737CL/NG MMEL to bring it into line with MAX changes
09 Dec 2019 - 737 Classic fuel tank sealant AD issued
07 Dec 2019 - Boeing fined by FAA due to inadequate oversight of slat track suppliers
19 Nov 2019 - Final report published into A6-FDN 737-800 Loss of Control during Go-Around at Rostov On Don on 19 Mar 2016.
26 Nov 2019 - Analysis of 737 Classic MLG failures on landing
25 Nov 2019 - 737-800 FQIS AD issued
25 Nov 2019 - Avior Airlines 737-400 YV-3012 MLG collapse during landing at Bogota on 22 Nov 2019
20 Nov 2019 - NTSB recommends that FAA mandate Boeing to redesign the 737NG engine fan cowl to minimize the potential of a catastrophic failure
20 Nov 2019 - Probable cause and findings published into uncontained engine failure to 737-700 N772SW on 17 Apr 2018
18 Nov 2019 - Preliminary report issued into Flybondi 737-800 RTO after tailstrike at Iguazu on 16 Jul 2018
16 Nov 2019 - Preliminary report issued into 5N-BRN Air Peace 737-500, skidded off the side of runway landing at Port Harcourt in heavy rain on 22 Jun 2019.
16 Nov 2019 - Preliminary report issued into 5N-BQO Air Peace 737-300 NLG Failure on landing at Lagos 23 Jul 2019
16 Nov 2019 - Preliminary report issued into 5N-BUK Air Peace 737-300 engine damage on landing at Lagos 15 May 2019
15 Nov 2019 - Criminal charges brought against Tartarstan Airlines management following accident to VQ-BBN 737-500 Loss of control after go-around at Kazan in 2013
13 Nov 2019 - FAA issue revised 737NG Pickle Fork AD
11 Nov 2019 - SkyUp Airlines UR-SQH 737-800 Landing Gear Fire after landing at Sharm El Sheikh 9 Nov 2019
10 Nov 2019 - New photo of the "Picklefork" added
09 Nov 2019 - MCAS - TAB preliminary report released
07 Nov 2019 - Photo added to the 737NG Pickle Fork AD page
31 Oct 2019 - RAF takes delivery of its first Poseidon maritime surveillance aircraft.
31 Oct 2019 - New details emerging about how MCAS was developed in House Committee hearing
30 Oct 2019 - Tribute to the 737-600
29 Oct 2019 - Boeing announces new 737-800 freighter conversion line in Guangzhou, China
25 Oct 2019 - Final report published into the Lion Air MAX PK-LQP accident of 29 Oct 2018
11 Oct 2019 - All the details about the 737NG Pickle Fork AD
09 Oct 2019 - 737-3/4/500 operations temporarily suspended at La Paz El Alto from 10 Oct 2019 by order of Bolivian DGAC
20 Sep 2019 - Final report published into Yan Air 737-400 UR-COI 737-400 Loss of cabin pressure on 23 Jun 2018
19 Sep 2019 - 737NG/MAX Thrust reverser AD issued
12 Sep 2019 - Final report published into West Atlantic 737-400 G-JMCR electrical failures in-flight on 12 Oct 2018
10 Sep 2019 - Final report issued into 737-200, XA-UHZ that crashed shortly after take off from Runway 06 at Havana, Cuba on 18 May 2018.
06 Sep 2019 - EASA makes public its four conditions for lifting MAX ban
25 Aug 2019 - The certification test flight for the changes to Boeing’s 737 MAX flight architecture is now expected to occur in early October. If succussful, a return to service should occur sometime in the fourth quarter of 2019.
23 Aug 2019 - Boeing intend to resume production of the MAX at a rate of 52 aircraft per month in February 2020
15 Aug 2019 - 2 ADs issued for fuselage cracks in 737-1/2/3/4/500 series & 1 AD issued for MAX slat track assemblies
15 Aug 2019 - Final report published into Korean 737-900 HL7725 737-900 tailstrike on go-around at Kansai on 9 Apr 2018
10 Aug 2019 - VQ-BKV Globus/S7 Airlines, runway overrun on takeoff at Moscow Domodedovo on 5 Aug 2019
09 Aug 2019 - Final report published into Xiamen 737-800 B-5498 Runway excursion after landing at Manila on 16 Aug 2018
08 Aug 2019 - Preliminary report issued into oil loss and IFSD of 737-800 ZS-ZWE at Tambo on 8 Jul 2019
06 Aug 2019 - MAX MCAS flight test program reaches 500 flights
05 Aug 2019 - Sixth operator workstation to be retrofitted to early P-8A Poseidons
03 Aug 2019 - CP-3077 MLG Shimmy Damage on Landing at La Paz
02 Aug 2019 - 737 MAX FCC Redesign
24 Jul 2019 - 5N-BQO Air Peace 737-300 NLG Failure on landing at Lagos 23 Jul 2019
23 Jul 2019 - AD issued for fatigue cracks in hydraulic systems A and B pressure module check valves
20 Jul 2019 - Final report published into Smartwings 737-800 N624XA overrun at Pardubice on Aug 1st 2018
19 Jul 2019 - Final report issued P2-PXE 737-800 landed short of runway at Chuuk, Micronesia 27 Sep 2018
19 Jul 2019 - AD issued for cracking in the lower lobe skin panel assemblies of the fuselage of 737-1/2/3/4/500 series
12 July 2019 - 737-300, EW-336PA operated by Belavia runway excursion at Kiev.
02 July 2019 - 737-800, VT-SYK operated by Spicejet runway excursion at Mumbai.
01 July 2019 - 737-800, VT-AYA operated by Air India Express runway excursion at Mangalore.
27 Jun 2019 - The last 737NG has been delivered
28 Jun 2019 - The Indian DGCA have issued their final report into the runway excursion on landing of 737-800, VT-AXT, (36331/2324), at Mumbai on 10 July 2018.
27 Jun 2019 - Further MAX problem identified
23 Jun 2019 - A 737-500, 5N-BRN, operated by Air Peace has skidded off the left hand side of Runway 21 at Port Harcourt, Nigeria at 14:42Z whilst landing in heavy rain.
13 Jun 2019 - AAIB report published into 737-800, YR-BMF, Tailstrike on departure.
13 Jun 2019 - EASA Issue LEAP-1B gearbox AD
12 Jun 2019 - 737 NG skin crack AD issued today
01 Jun 2019 - NTSB issue investigative update on N732MA Miami Air 737-800 runway overrun at Jacksonville
31 May 2019 - Radome collapses added
31 May 2019 - Update on the return to service of the MAX
23 May 2019 - Ryanair 737-800 photo added
23 May 2019 - 737-1/2/3/4/500 pitot heat AD issued
16 May 2019 - EW-290PA 737-500 Runway Excursion in Fog final report published
13 May 2019 - Roller Coaster manouvre added
12 May 2019 - Evolution of the Runaway Stab Trim procedure added
09 May 2019 - Widespread fatigue damage in multiple locations between stringers S-10 and S-17 above the passenger floor AD issued for 737-1/2/3/4/500 series
08 May 2019 - TAB details added
04 May 2019 - N732MA Miami Air 737-800 runway overrun at Jacksonville
30 Apr 2019 - Boeing says that AoA disagree alert was not activated as intended on MAX without optional AoA display
20 Apr 2019 - JATR details added
19 Apr 2019 - Details of the FAA FBS draft report added
17 Apr 2019 - Flight testing of redesigned MCAS is complete
09 Apr 2019 - Final report published into runway overrun of 737-800, 9Y-PBM, Caribbean Airlines at Georgetown, Guyana 30 Jul 2011.
04 Apr 2019 - Ethiopian Ministry of Transport issue the preliminary report into the ET-AVJ MAX-8 accident
04 Apr 2019 - The first MAX -10 fuselage, l/n 7644, has arrived at Renton.
03 Apr 2019 - UK orders 5 737 P-8 AEWC
24 Mar 2019 - More details added to MCAS description and proposed fix by Boeing
13 Mar 2019 - FAA grounds the MAX after the Ethiopian and Lion Air accidents are thought to be connected by MCAS issues
12 Mar 2019 - The UK CAA follows several other countries in grounding the 737 MAX
11 Mar 2019 - FAA issue CANIC about the MAX MCAS
10 Mar 2019 - Ethiopian Airlines 737 MAX-8 belived to have crashed on a flight from Addis Ababa to Nairobi. 149 pax + 8 crew on board
21 Jan 2019 - Sales and delivery data for 2019 added
18 Jan 2019 - Air Horizont 737-400 photo added
13 Jan 2019 - 737 MAX-200 makes its maiden flight
12 Jan 2019 - Podeba 737-800 photo added
10 Jan 2019 - 737NG MLG doors AD issued
02 Jan 2019 - 737 features prominently in commercial aviation fatalities accident record for 2018