From b6f24ef5aaea0b936189c74f547c9ca7ae52b7ca Mon Sep 17 00:00:00 2001
From: jet2code <airb95@gmail.com>
Date: Wed, 15 Jan 2025 19:10:19 -0500
Subject: [PATCH 1/4] Set atcCallsign initial value to null

---
 fbw-a380x/src/systems/instruments/src/MFD/FMC/fmgc.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fbw-a380x/src/systems/instruments/src/MFD/FMC/fmgc.ts b/fbw-a380x/src/systems/instruments/src/MFD/FMC/fmgc.ts
index 9b7b741d070..302d97ef800 100644
--- a/fbw-a380x/src/systems/instruments/src/MFD/FMC/fmgc.ts
+++ b/fbw-a380x/src/systems/instruments/src/MFD/FMC/fmgc.ts
@@ -57,7 +57,7 @@ export class FmgcData {
 
   public readonly cpnyFplnUplinkInProgress = Subject.create(false);
 
-  public readonly atcCallsign = Subject.create<string>('----------');
+  public readonly atcCallsign = Subject.create<string | null>(null);
 
   /** in degrees celsius. null if not set. */
   public readonly cruiseTemperaturePilotEntry = Subject.create<number | null>(null);

From 9efd977f24a50d66981a21b01a413bdba9f26032 Mon Sep 17 00:00:00 2001
From: jet2code <airb95@gmail.com>
Date: Wed, 15 Jan 2025 19:11:23 -0500
Subject: [PATCH 2/4] Update changelog.md

---
 .github/CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/CHANGELOG.md b/.github/CHANGELOG.md
index 196116ce971..89dd2a41a36 100644
--- a/.github/CHANGELOG.md
+++ b/.github/CHANGELOG.md
@@ -4,6 +4,7 @@
 <!-- Always use "1." at the start instead of "2. " or "X. " as GitHub will auto renumber everything. -->
 <!-- Use the following format below -->
 <!--  1. [Changed Area] Title of changes - @github username (Name)  -->
+1. [A380X/MFD] Fixed FLT NBR not displaying as a mandatory input field - @jet2code (john.xyz)
 
 ## 0.13.0
 

From cf5df8b5d03718d58b8f6511e277e379a7d9f1c5 Mon Sep 17 00:00:00 2001
From: jet2code <airb95@gmail.com>
Date: Fri, 17 Jan 2025 12:40:37 -0500
Subject: [PATCH 3/4] Update changelog.md

---
 .github/CHANGELOG.md | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.github/CHANGELOG.md b/.github/CHANGELOG.md
index 2b3a7943a47..251bf24eb04 100644
--- a/.github/CHANGELOG.md
+++ b/.github/CHANGELOG.md
@@ -4,8 +4,6 @@
 <!-- Always use "1." at the start instead of "2. " or "X. " as GitHub will auto renumber everything. -->
 <!-- Use the following format below -->
 <!--  1. [Changed Area] Title of changes - @github username (Name)  -->
-1. [A380X/MFD] Fixed FLT NBR not displaying as a mandatory input field - @jet2code (john.xyz)
-
 ## 0.13.0
 
 1. [GENERAL] Fixed issue in C++ WASM Framework that caused performance degradation in some WASM modules - @frankkopp (cdr_maverick)
@@ -126,7 +124,7 @@
 1. [A380X/MFD] Add airport data page into the MFD (DATA > AIRPORT) - @bulenteroglu (senolitam)
 1. [A380X/EFB] Adds PRIM/SEC/FCDC failures to EFB - @flogross89 (floridude)
 1. [A380X/PFD] Fix precision of pitch trim indicator - @flogross89 (floridude)
-
+1. [A380X/MFD] Fixed FLT NBR not displaying as a mandatory input field - @jet2code (john.xyz)
 
 ## 0.12.0
 

From b95c1d823066dd53e447e78c6e375617a9df0282 Mon Sep 17 00:00:00 2001
From: jet2code <airb95@gmail.com>
Date: Fri, 17 Jan 2025 12:40:54 -0500
Subject: [PATCH 4/4] Set atcCallsign string in header when it is null

---
 .../src/systems/instruments/src/MFD/MfdPageDirectory.tsx    | 2 +-
 .../instruments/src/MFD/pages/common/AbstractHeader.tsx     | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/fbw-a380x/src/systems/instruments/src/MFD/MfdPageDirectory.tsx b/fbw-a380x/src/systems/instruments/src/MFD/MfdPageDirectory.tsx
index 8b84d3d9a92..fde3a77b18b 100644
--- a/fbw-a380x/src/systems/instruments/src/MFD/MfdPageDirectory.tsx
+++ b/fbw-a380x/src/systems/instruments/src/MFD/MfdPageDirectory.tsx
@@ -116,7 +116,7 @@ export function pageForUrl(
 export function headerForSystem(
   sys: string,
   mfd: DisplayInterface & MfdDisplayInterface,
-  atcCallsign: Subscribable<string>,
+  atcCallsign: Subscribable<string | null>,
   activeFmsSource: Subscribable<'FMS 1' | 'FMS 2' | 'FMS 1-C' | 'FMS 2-C'>,
   uiService: MfdUiService,
 ): VNode {
diff --git a/fbw-a380x/src/systems/instruments/src/MFD/pages/common/AbstractHeader.tsx b/fbw-a380x/src/systems/instruments/src/MFD/pages/common/AbstractHeader.tsx
index 6725d61f989..14814248ed3 100644
--- a/fbw-a380x/src/systems/instruments/src/MFD/pages/common/AbstractHeader.tsx
+++ b/fbw-a380x/src/systems/instruments/src/MFD/pages/common/AbstractHeader.tsx
@@ -14,7 +14,7 @@ import { MfdUiService } from 'instruments/src/MFD/pages/common/MfdUiService';
 
 interface AbstractMfdHeaderProps {
   activeFmsSource: Subscribable<'FMS 1' | 'FMS 2' | 'FMS 1-C' | 'FMS 2-C'>;
-  callsign: Subscribable<string>;
+  callsign: Subscribable<string | null>;
   uiService: MfdUiService;
   mfd: DisplayInterface & MfdDisplayInterface;
 }
@@ -108,7 +108,9 @@ export abstract class AbstractHeader extends DisplayComponent<AbstractMfdHeaderP
           hEventConsumer={this.props.mfd.hEventConsumer}
           interactionMode={this.props.mfd.interactionMode}
         />
-        <span class="mfd-header-callsign">{this.props.callsign}</span>
+        <span class="mfd-header-callsign">
+          {this.props.callsign.map((cs) => (cs !== null ? this.props.callsign : '----------'))}
+        </span>
       </div>
     );
   }