I'm on 0302 and P3Dv4.5HF3

When Any new caution occurred, the Master Caution light AND ALL System Annunciator Light with a fault in will light up.
The correct behavior is only the new one related system would lit up

For example, on the ground, when I have low fuel pressure, low hyd/flight control pressure, doors, etc etc... are already lighted up, and Master Caution reset. when a new DUAL BLEED light came on, the Master Caution should only come on with  "AIR COND" annunciator.  but currently in 0302, FLT CON,FUEL,HYD,DOORS they all came along with it.

I also noticed when sometimes a light extinguished , for example when put ELEC HYD PUMPS ON, and the LOW PRESSURE goes out in preflight, the Master Caution would came on in CS733, and as the LOW PRESSURE light gone, there is no related HYD annociator.

I didn't do extended test on this, so I'm not sure how exact this bug works, but I've seem it quite few time just doing a normal preflight.

To add a little more for the Master Caution system, when no fault there and doing recall by pressing System Annunciator, the Master caution should came on, then out when released, but currently in CS733, only all System Annuciator light are came on.

I have seem this behaivor on 2 other developer's 737... not sure why, maybe the description on FCOM is not clear... but it's not how real thing works.

When testing this, I noticed when in preflight condition, if I turn ON ELEC HYD PUMP then turn it off, the illuminating of  LOW PRESSURE light would not bring Master Cation and SA on.
Also Tried in air,either ELEC nor ENG pump off would bring MC and SA lights on(even with 2 pumps off ifn different side), but if BOTH are off on one side, the MC+FLYCON+HYD will lit up correctly.

And the FUEL LOW PRESSURE light on MAIN TANK should only bring Master Caution light on if BOTH are lit on the same side, currently in CS733, any one LOW PRESSURE light on FUEL panel will bring the MC and FUEL SA on.

The WINDOW HEAT OVERHEAT light, one or even all lit up, also didn't trigger the Master Caution as it should be.

All of the above has been fixed in the v.1.0

Angel of Attack wrote on May 15^th, 2021 at 7:01am:

When testing this, I noticed when in preflight condition, if I turn ON ELEC HYD PUMP then turn it off, the illuminating of  LOW PRESSURE light would not bring Master Cation and SA on. Also Tried in air,either ELEC nor ENG pump off would bring MC and SA lights on(even with 2 pumps off ifn different side), but if BOTH are off on one side, the MC+FLYCON+HYD will lit up correctly.

This still persistences on V1.0

On v1.0, when RECALL the SA, only the side depressed will illuminate.
IRL when RECALL with any SA, both sides SA and MC light should illuminate when SA are depressed.

On V1.0
When using LIGHTS TEST switch to TEST. it should have same effect as recall when released back to BRT or DIM, the SA should recall all existing fault.

On V1.0
MC and SA not show "new" fault if there are already one.
The test I have done:

1. in normal flight, switch OFF one left tank FUEL PUMP switch, LOW PRESSURE light and MC+SA(FUEL) lit up correctly
2.Reset MC, but keep FUEL PUMP off
3.Turn off another main tank's FUEL PUMP, maybe the right one, or another left one, same.
4. Now the new LOW PRESSURE light is on, BUT the MC+SA doesn't show up, IRL it should lit up now.
5. I can switch back on and off the first switch I moved in step 1, the MC+SA still stay off.

I also tried same logic with SA(ANTI-ICE) by prob heat and window overheat test switches, it's the same result, so I think it's the logic fault on all system. 

Angel of Attack wrote on Jun 15^th, 2021 at 10:55am:

On V1.0 MC and SA not show "new" fault if there are already one. The test I have done: 1. in normal flight, switch OFF one left tank FUEL PUMP switch, LOW PRESSURE light and MC+SA(FUEL) lit up correctly 2.Reset MC, but keep FUEL PUMP off 3.Turn off another main tank's FUEL PUMP, maybe the right one, or another left one, same. 4. Now the new LOW PRESSURE light is on, BUT the MC+SA doesn't show up, IRL it should lit up now. 5. I can switch back on and off the first switch I moved in step 1, the MC+SA still stay off. I also tried same logic with SA(ANTI-ICE) by prob heat and window overheat test switches, it's the same result, so I think it's the logic fault on all system.

BTW, please do the following test when fix this problem:
step 1-3 is the same, and now MC+SA(FUEL) should be on.
4a.now, without reset the MC, switch back on the 2nd switch moved in step3,
5a.the MC+SA(FUEL) should stay on, as there is still a LOW PRESSURE light there on FUEL panel, even if it's been reset.

Please try 1001

The problem on #3 and #7 with HYD still persist on 1001
The new fault condition on FUEL and ANTI-ICE "by prob heat and window overheat test switches" are resolved, but when I try turn left prob heat off, cancel MC, and turn right prob heat off, there is still no new trigger...
As I said, it's a basic  logic fault on all system, so please check them all...

not sure if it's new, but when I tried these 3 in "ready for takeoff" States,SA(ELEC) would not turn on:
1.turn STANDBY POWER to OFF, thus trigger STANDBY PWR OFF light.
2. turn GEN1(or2) off, thus trigger BUS OFF light
3.DISCONNECT CDS, thus, turn both LOW OIL PRESSURE and BUS OFF light.

Only when I shut down engine without APU nor GPU in, and TRANSFER BUS OFF light on, I can see the SA(ELEC) light up.

Angel of Attack wrote on Jun 25^th, 2021 at 10:28am:

not sure if it's new, but when I tried these 3 in "ready for takeoff" States,SA(ELEC) would not turn on

Do you have all conditions for ELEC lit on?

EY wrote on Jun 25^th, 2021 at 1:06pm:

Angel of Attack wrote on Jun 25th, 2021 at 10:28am: not sure if it's new, but when I tried these 3 in "ready for takeoff" States,SA(ELEC) would not turn on Do you have all conditions for ELEC lit on?

FCOM v2, 15.20,System Annunciator Lights

Please try 1002

EY wrote on Jun 28^th, 2021 at 7:22pm:

Please try 1002

Seems mostly fixed, thanks, but still HYD will only on when BOTH pumps are off on one side.
Not sure if you have confused it with center fuel pump LOW PRESSURE light, which require both lit to trigger MC...(and that fuel one is done correctly).
I also find a might related bug on HYD and FLT CTL system, see: https://www.captainsim.org/forum/csf.pl?num=1624958577/0#0

Please try 1003

Angel of Attack wrote on Jun 15^th, 2021 at 10:48am:

On V1.0 When using LIGHTS TEST switch to TEST. it should have same effect as recall when released back to BRT or DIM, the SA should recall all existing fault.

While most other things seems fixed in 1003, this one still there.
And I noticed when moving it from BRT to DIM, ELEC will be recalled, but nothing else, while moving out from TEST would recall nothing.

one new noticed in 1003 is the FLIGHT RECORDER OFF and EQUIP COOLING seems not linked to right side SA[OVERHEAD]....but as Both light would lit up unnecessarily in current version...well...

One thing I'm not sure is if the APU LOW OIL PRESSURE light in normal start cycle would trigger SA[APU], as I know if it's APS200 or newer one like on NG or MAX, it wouldn't, but seems your model have an older APU installed, so not sure...

fixed in 1004

Seems to me 1004 and 1000 for -5 are same with 1003.
But at this point, the caution system works mostly fine with normal operation. So I actually would rather you move on to fix other issue which have more effect on normal flight.