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Accident: DHL Expreso B752 at San Jose on Apr 7th 2022, hydraulic failure result...

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DHL Expreso B752 at San Jose on Apr 7th 2022, hydraulic failure results in runway excursion

The Aviation Herald Last Update: Friday, Apr 8th 2022 19:58Z27831 Articles availableEvents from Mar 23rd 1994 to Apr 7th 2022  www.avherald.comIncidents and News in Aviation   

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Accident: DHL Expreso B752 at San Jose on Apr 7th 2022, hydraulic failure results in runway excursion

By Simon Hradecky, created Thursday, Apr 7th 2022 18:32Z, last updated Friday, Apr 8th 2022 19:40Z

A DHL Aero Expreso Boeing 757-200, registration HP-2010DAE performing flight D0-7216 from San Jose (Costa Rica) to Guatemala City (Guatemala) with 2 crew, was climbing out of San Jose's runway 07 at about 09:40L (15:40Z) when the crew stopped the climb at about FL210 declaring Mayday due to a hydraulic failure. The aircraft entered a hold while the crew worked the related checklists. The aircraft subsequently returned for an approach to runway 07 about 45 minutes after departure. After touchdown at 10:24L (16:24Z) the crew lost control of the aircraft, which spun around and went off the runway causing the aircraft to break up into two parts, both main gear struts collapsed. The crew was able to exit the aircraft without serious injuries.

Relevant NOTAMs:
A0538/22 NOTAMR A0537/22
Q) MHCC/QMRLC/IV/NBO/A/000/999/1000N08413W005
A) MROC B) 2204071748 C) 2204080000
E) RWY 07/25 CLSD

A0537/22 NOTAMN
Q) MHCC/QMRLC/IV/NBO/A/000/999/1000N08413W005
A) MROC B) 2204071628 C) 2204072000
E) RWY 07/25 CLSD

Metars:
MROC 071800Z 23008KT 200V280 9999 FEW040 BKN250 28/19 A3001 NOSIG=
MROC 071700Z 24009KT 210V290 9999 FEW045 BKN250 27/19 A3003 NOSIG=
MROC 071600Z 24008KT 200V270 CAVOK 27/16 A3005 NOSIG=
MROC 071500Z VRB04KT CAVOK 27/11 A3005 NOSIG=
MROC 071400Z 03004KT 360V080 CAVOK 24/14 A3005 NOSIG=
MROC 071300Z 07004KT CAVOK 21/14 A3003 NOSIG=
MROC 071200Z 06005KT CAVOK 17/13 A3001 NOSIG=
MROC 071100Z 07008KT CAVOK 18/13 A2998 NOSIG=

Final approach, landing and aftermath (Video: Aviation Maintenance World):

https://www.youtube.com/watch?v=E4bEVpO5rXg

Landing and aftermath (Video: Juan Manuel Urbina):https://www.youtube.com/watch?v=FNi4DhcFfMYThe aircraft seen after situation was under control:
The aircraft seen after situation was under control

The aircraft seen after situation was under control

Aerial overview of the accident site:
Aerial overview of the accident site

Map (Graphics: AVH/Google Earth):
Map (Graphics: AVH/Google Earth)

Reader Comments: (the comments posted below do not reflect the view of The Aviation Herald but represent the view of the various posters)
Mayday? Why?
By 75ops on Friday, Apr 8th 2022 23:10Z
Hyd failure is not a mayday event. Redundent systems mean the aircraft is flyable. Very odd.
By Pamadja on Friday, Apr 8th 2022 22:58Z
How did the pilots get out? Door 1L? No slide?
Vertical terrain features around runways
By jrs on Friday, Apr 8th 2022 22:39Z
"I wonder why they are allowed to operate an airport where a runway excusion results into a desaster."

The runway is in Costa Rica, a tropical climate, They get a lot of rain, that necessitates a serious drainage system. Thus the verticality.
Idle reverse
By Kamran Ali Paruk on Friday, Apr 8th 2022 22:02Z
You can hear the high thrust setting after touchdown. Sounds like full reverse. The TR is hydraulic I think. They look like Pratt engines cause GE are pneumatic
@ 757driver
By airbusdriver on Friday, Apr 8th 2022 19:29Z
Are you sure about only 1 to 2 applications? Seems not enough. On airbus you have at least 7 brake applications out of the accumulators and a designated pressure gauge to avoid locking the brakes.
I'm not rating - just wondering.
757 driver
By Nathan Moeller on Friday, Apr 8th 2022 19:04Z
Thank you! Great info.
No reverser
By 757 driver on Friday, Apr 8th 2022 17:40Z
No left reverser. After the 180 turn there also is no right reverser. So either it was stowed before the excursion or never used.
Smoke from the mains are most likely from blown tires, since even max braking will not cause smoke for a while.
If both L and R HYD systems were gone then the only available braking is with the accumulator. Basically you only get 1 or 2 applications, meaning you have to hold the brakes. That also means no AntiSkid, which can lead to blown tires.
Idle reverse
By 727driver on Friday, Apr 8th 2022 17:38Z
I see smoke from the tyres of left landing gear, too early for brakes to smoke IMHO. BTW, in case of L HYD SYS loss, no selection of autobrake per Boeing procedure.
dhl
By manuel tejado on Friday, Apr 8th 2022 17:32Z
Check DHL Expreso B752 at Mexico City on Feb 11th 2022, flapless landing
B757
By jetrepo on Friday, Apr 8th 2022 17:27Z
so sad to see this happen to one of these fine jets, maybe one of the best ever produced. good luck to this crew
Idle reverse
By Kamran Ali Paruk on Friday, Apr 8th 2022 17:20Z
Number 1 engine thrust reverser didn’t deploy and he selected full reverse. You can see the number 2 main gear brakes smoking from the auto brakes to keep it centre. No bueno
@Nathan Moeller.
By C172Driver on Friday, Apr 8th 2022 16:41Z
I was wondering the same.
In the AMW Video at 1:12 min is look like its open. Could be just a shadow..
Thrust Reversers
By Nathan Moeller on Friday, Apr 8th 2022 16:30Z
Am I seeing things or did the reverse thrust deploy on the #2 only? I know that much asymmetry wouldn't immediately cause a slide but wondering if it was contributory.
By Luke Leatherman on Friday, Apr 8th 2022 15:36Z
Investigators are going to be thankful for this video. Im no investigator, but here is what I suspect. The landing seemed normal at first. Although I am not sure how it snapped around the way it did. I can think of a couple of possibilities, either slick runway conditions, mechanical failure, or they may have pulled a TAM 3054 and the thrust reverser on the left engine wasn't working and left the left engine at more thrust than they needed. They did report a hydraulic failure, so maybe some controls that were crucial for landing were either limited or eliminated entirely. However, that job is for the investigators of the NTSB and other transportation safety organizations involved in this accident.
Wrong Airline
By (anonymous) on Friday, Apr 8th 2022 15:35Z
DHL Air and DHL Aero Expreso are not the same airline/operator.
To John Castleberry
By armchair smartass on Friday, Apr 8th 2022 15:27Z
Why shut down the comment section. I would get if you were asking for login with google acccount or something like that so that trolls would have to put in a bit more effort to create accounts and that would keep comment section cleaner. Removing the comment section altogether does not improve anything for users who find that its full of crap. Nobody forces you to read the comments or write comments and you can just keep using the website as if there was no comment section at all.
Listen to the audio for clues. Thrust Asymmetry.
By DJ on Friday, Apr 8th 2022 15:23Z
If you listen to the videos of the accident using headphones or a decent speaker (not a cell phone or laptop speakers) you can hear that the left engine was producing significant thrust at the time of the excursion. You can also hear that power was added at touchdown, seemingly indicating that they were using reverse thrust.

As the aircraft skids around, you can actually see the smoke being blown backwards by the left engine, especially in the higher-resolution versions of the videos that are floating around on social media. As the aircraft continues to spin around, the engine sound gets muffled as the fuselage blocks the view of the left side.
Staying on the runway
By Kai Petzke on Friday, Apr 8th 2022 15:15Z
The landing looked rather normal in the beginning. The flaps are only extended partly, though, requiring a high landing speed. With left thrust reverser INOP and right thrust reverser deployed, they had a right turning momentum. At high speed, they can aerodynamically counter with the rudder, at lower speed, they need differential breaking, which the pilots applied, but which was not enough to keep the aircraft centered on the runway.

If the pilots had stopped the reverse thrust and used the brakes only from below 60 kts, they would have been able to stop on the runway. Of course, they then need a tow truck to pull them away, as they have no nose wheel steering.
@ speculator & John Castleberry, P2F
By gasman on Friday, Apr 8th 2022 15:06Z
It's still annoying if somem facts, particularly technical ones, have already been stated/explained and later posters (posers?) spew the same nonsense without reading earlier comments.
But yes, welcome to the internet.

The second comment mentioned P2F freighters and I thought of pay-to-fly had arrived at DHL now...

Tailwinds
@Pauli
By Andreas on Friday, Apr 8th 2022 14:52Z
The main gear brake system is the RH Hydr. system. The LH system powers the Alternate brake system.
The Airbusses have PTUs to transfer hyd. energy from blue to green hyd. system and vice versa. Bur if you have leakage the show is over
The 757 has hyd. power transfer only for the ldg gear and -doors hyd. center system to LH system to ldg gear system
@John Castleberry
By Speculator on Friday, Apr 8th 2022 14:39Z
First, welcome to the internet, John.

Preventing comments would be a terrible idea and would tank traffic on this site.

The owner does a fine job removing truly imbecilic comments.

The notion that nobody be allowed to speculate or conjecture is really pretty silly. And many commenters are quite knowledgeable and complement and enhance the site.
As an A&P
By Bo K on Friday, Apr 8th 2022 14:35Z
In 2008, 757 from a Canadian airline land in Dominican Republic with a hydraulic problem (empty). On the runway, as they applied the brakes, the anti-skid system seems to require the system that had leaked out. The brakes engaged and locked up seizing all 8 brakes the point of chunks breaking apart. The aircraft had come to a stop on the runway. 2 of us took off every tire, removed brakes and put the brake on the ops Pickup truck and reinstalled the tire X8. Planes were circling running low on fuel by the time we finished. Flexible braided line in the nose wheel well that exploded. I would not be surprised that same line popped in this occasion. It seemed like that flex line was a poor design and a rigid line could have been installed. MCC and the airline techs not listening to my suggestions, and only replacing the broken line and the brakes. I suggested the eng driven hydraulic pumps and the elec pump plus filters. Full of pax, on pushback the eng driven pump failed. Thank God it was on the ground.
loss of left hydraulic system (?)
By Pauli on Friday, Apr 8th 2022 14:32Z
In the first video i realized the 757 approaching with open L/G doors, thus the gear has been extended by gravity. This would indicate that they lost the left hydraulic system as it is the one powering the gears. That would also mean they would have definitely lost the nose wheel steering powered by left system.

I honestly dont know the 757... as i am a Airbus-engineer(mostly).
Any Boeing 757 certified engineer here that could check if the loss of the left system could result in a loss of anti-skid?

I see the brakes are powered by the right system.
Airport
By tzui on Friday, Apr 8th 2022 14:24Z
I wonder why they are allowed to operate an airport where a runway excusion results into a desaster.
Comments here are wild
By Pilotalexyyz on Friday, Apr 8th 2022 13:49Z
Man the comments here speculating what's going on etc. are insane. How can people make such insane remarks about poor airmanship etc. Unless you are a real world airline pilot making comments about crew is something you have no idea about.
Shutting Down Comments
By John Castleberry on Friday, Apr 8th 2022 13:38Z
Simon,
I've followed you site for years, finding your content very informative on the issues. However, the comment section is, at times, loaded with bloviating supposition, pathetic conjecture, and even personal bashings. And it's not getting any better.

Perhaps it would be a good time to permanently shutdown comments for good and maintain the integrity of AvHerald instead of allowing it to turn into Facebbok type environment laced with untruths and bashings.
DHL Runway Excursion
By 727driver on Friday, Apr 8th 2022 13:35Z
Looks like they lost the L HYD SYS, because no reverse on ENG #1, so no NWS.
Panamá and aviation
By Sotolip on Friday, Apr 8th 2022 13:32Z
Airmanship, poor skills and corruption. Bad combination.
DHL B 752
By SailorMan on Friday, Apr 8th 2022 13:31Z
Why would they build an airport like that with a big ditch right next to the runway, ?
Asked in ignorance, sailor not a flyer except as passenger
DHL Runway Excursion
By Milan Franceschi on Friday, Apr 8th 2022 13:29Z
As a guess it looks like nose wheel steering was lost and directional control was lost due to improper braking technique. A locked brake/blown tire could also render this result. Using differntial braking to steer is a lost art.
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