DIAMOND DA42 TDI Model Guide
DIAMOND DA42 TDI · Model Guide
Overview
The DIAMOND DA42 TDI is a low-wing, retractable-gear twin built mainly from carbon-fibre reinforced plastic. The source documents describe two Thielert TAE 125-02-99 diesel engines of 135 hp each, a T-tail, winglets and a Garmin G1000 panel. The documents give a maximum takeoff weight of 3935 lbs. Check the paperwork against the Airplane Flight Manual.
- Two 135 hp turbocharged diesels, each with FADEC and two ECUs; they burn Jet A1 and no additives are permitted.
- Max takeoff and landing weight are both 3935 lbs; empty weight is listed as 2928.90 lbs.
- Fuel: 25 gal useful per main tank, plus optional 13 gal aux tanks in the nacelles.
- Recommended RSB 42-139 replaces the rudder T-yoke axle; ask whether it has been done.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at sprinkle.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Model Guide
- Year ·
- 2026
- File size ·
- 49 KB
- Copy found at ·
- sprinkle.com
Specifications & performance
Extracted from this document.
Specifications
- Engine power (hp) ·
- 135
- Aux tank useful (gal) ·
- 13
- Main tank useful (gal) ·
- 25
- Max restart altitude (ft) ·
- 8,000
- Max operating altitude (ft) ·
- 18,000
Performance
- Best glide speed (kt) ·
- 85
- Max restart altitude (ft) ·
- 8,000
- Best rate climb speed (kt) ·
- 82
- Max operating altitude (ft) ·
- 18,000
- Best angle climb speed (kt) ·
- 82
V-speeds
- VX_KTS ·
- 82
- VY_KTS ·
- 82
- VFE_APP_KTS ·
- 137
- VFE_LDG_KTS ·
- 111
- VS0_LDG_1400KG_KTS ·
- 54
- VS0_LDG_1785KG_KTS ·
- 62
- VS_CLEAN_1400KG_KTS ·
- 63
- VS_CLEAN_1785KG_KTS ·
- 69
Weight & balance
- Empty weight (lb) ·
- 2,928.9
- Max nose baggage (lb) ·
- 66
- Max cabin baggage (lb) ·
- 100
- Max landing weight (lb) ·
- 3,935
- Max takeoff weight (lb) ·
- 3,935
What engines does the DIAMOND DA42 TDI use?
The DIAMOND DA42 TDI documents describe two four-cylinder, liquid-cooled, turbocharged Thielert TAE 125-02-99 diesels. Each makes 135 hp at 2300 RPM and is run by a FADEC with two ECUs.
What fuel does the DIAMOND DA42 TDI take?
The DIAMOND DA42 TDI uses Jet A1. The checklist says no additives are permitted when refuelling with Jet A1. Each wing tank holds 25 gal useful, and optional aux tanks hold 13 gal each.
What is the family-level range and speed?
The registry lists DA 42, DA 42 NG and DA 42 M-NG together, with up to 1030 nm range and up to 185 kt cruise. These are family maxima, not DIAMOND DA42 TDI figures, so check the Airplane Flight Manual.
Is there a service bulletin to check on the DIAMOND DA42 TDI?
Yes. Check whether RSB 42-139 (rudder T-yoke axle replacement, 21-Oct-2019, recommended) has been done on the DIAMOND DA42 TDI, by serial number. Labour is about 3 to 6 hours.
What is the DIAMOND DA42 TDI Model Guide?
The DIAMOND DA42 TDI Model Guide is a model guide for the DIAMOND DA42 TDI, dated 2026.
What year was the DIAMOND DA42 TDI Model Guide published?
The DIAMOND DA42 TDI Model Guide — the DIAMOND DA42 TDI model guide on file — is dated 2026.
Common. More common than 96% of the aircraft models we track.
Most owners only have the POH. Here's the essential set for the DIAMOND DA42 TDI.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
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In this document
Weights, fuel and loading
Listed limits: empty weight 2928.90 lbs, max takeoff and max landing weight 3935 lbs. Baggage is limited to 66 lbs in the nose and 100 lbs in the cabin. Each wing tank holds 25 gal useful. Aux tanks of 13 gal each are an option, so confirm they are fitted. Maximum fuel unbalance in cruise is 5 USG.
Engines and systems to inspect
Each Thielert diesel makes 135 hp at 2300 RPM and has two ECUs, with only one active at a time. The propeller is a three-blade constant-speed feathering unit. Check the engine and gearbox oil levels, drain the fuel filter sediment bowl for water, and test the fire detector, stall warning and gear on every preflight. Allow a 2-minute idle before shutdown to protect the turbocharger.
Service history: rudder T-yoke axle
RSB 42-139 / 42NG-081 (21-Oct-2019, category Recommended, compliance at owner's discretion) covers DA 42, DA 42 M, DA 42 NG and DA 42 M-NG airplanes by serial number. It replaces the rudder T-yoke axle after two reports of a loose axle nut that could reduce rudder control. Labour is about 3 hours with a 200 h or annual inspection, otherwise about 6 hours.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Restart in flight is limited to 8,000 ft and 80-120 KIAS; max operating altitude is 18,000 ft.
- In-flight shutdown must occur above 1300 RPM or the propeller start lock engages. Never rotate propellers by hand.
- The checklist is a reference only; the Airplane Flight Manual governs. Diesel fuel temperature must be at least +5° before takeoff.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
DIAMOND DA42 TDI Model Guide The DIAMOND DA42 TDI is a low-wing, retractable-gear twin built mainly from carbon-fibre reinforced plastic. The source documents describe two Thielert TAE 125-02-99 diesel engines of 135 hp each, a T-tail, winglets and a Garmin G1000 panel. The documents give a maximum takeoff weight of 3935 lbs. Check the paperwork against the Airplane Flight Manual. • Two 135 hp turbocharged diesels, each with FADEC and two ECUs; they burn Jet A1 and no additives are permitted. • Max takeoff and landing weight are both 3935 lbs; empty weight is listed as 2928.90 lbs. • Fuel: 25 gal useful per main tank, plus optional 13 gal aux tanks in the nacelles. • Recommended RSB 42-139 replaces the rudder T-yoke axle; ask whether it has been done. Weights, fuel and loading Listed limits: empty weight 2928.90 lbs, max takeoff and max landing weight 3935 lbs. Baggage is limited to 66 lbs in the nose and 100 lbs in the cabin. Each wing tank holds 25 gal useful. Aux tanks of 13 gal each are an option, so confirm they are fitted. Maximum fuel unbalance in cruise is 5 USG. Engines and systems to inspect Each Thielert diesel makes 135 hp at 2300 RPM and has two ECUs, with only one active at a time. The propeller is a three-blade constant-speed feathering unit. Check the engine and gearbox oil levels, drain the fuel filter sediment bowl for water, and test the fire detector, stall warning and gear on every preflight. Allow a 2-minute idle before shutdown to protect the turbocharger. Service history: rudder T-yoke axle RSB 42-139 / 42NG-081 (21-Oct-2019, category Recommended, compliance at owner's discretion) covers DA 42, DA 42 M, DA 42 NG and DA 42 M-NG airplanes by serial number. It replaces the rudder T-yoke axle after two reports of a loose axle nut that could reduce rudder control. Labour is about 3 hours with a 200 h or annual inspection, otherwise about 6 hours. Safety notes: • Restart in flight is limited to 8,000 ft and 80-120 KIAS; max operating altitude is 18,000 ft. • In-flight shutdown must occur above 1300 RPM or the propeller start lock engages. Never rotate propellers by hand. • The checklist is a reference only; the Airplane Flight Manual governs. Diesel fuel temperature must be at least +5° before takeoff.